Arrive in Vienna and transfer to your hotel.

The “City of Waltzes” offers a treasure trove of gems just waiting to be discovered on your city tour. See the majestic Opera House and the former Imperial Palace of the Habsburgs before concluding in Vienna's historic city center. (B)

Excursions:

• Imperial Vienna tour

Board the ship for your Gems of Southeast Europe cruise. During the evening, be treated to an Illuminations cruise. (D)

Excursions:

• Transfer to Budapest
• Queen of the Danube tour
• Embarkation
• Illuminations cruise
• Illuminations Cruise

Enjoy a scenic morning cruise to Mohács. You'll then visit Pécs, founded more than 2,000 years ago by the Romans. Visit the UNESCO-designated Christian Necropolis; St. Peter's Basilica, the city's main Catholic cathedral along with its catacombs; and Széchenyi Square, the heart of Old Town Pécs. You will also see the Mosque of Pasha Qasim the Victorious, one of the symbols of the city. Or for wine connoisseurs, you'll want to go to the Szekszárd wine region, one of the oldest red-wine-growing areas in Hungary, established more than 2,000 years ago. You may also take an exhilarating guided bike tour around Mohács. (B/L/D)

Excursions:

• Scenic cruising
• Pécs excursion OR Mohács bike tour OR Szekszárd wine tasting

Vukovar is a Croatian symbol of resistance, which you'll better understand on your city tour showcasing the Ovčara Memorial and Eltz Castle. Alternatively, choose a wine tasting in Ilok, a center of wine production since Roman times, where you'll sample its famous Grasevina, Traminac and Frankovka wines. Back on board, cruise to Novi Sad, sometimes called the “Serbian Athens.” Discover Novi Sad on a walking tour to Dunavski Park and through Stari Grad, the Old Town center. If you prefer a more active exploration, join a guided biking tour or hike through Fruska Gora National Park. During the evening, visit Petrovaradin Fortress, a mighty stronghold no enemy has ever breached. (B/L/D)

Excursions:

• Full-day Novi Sad tour OR Highlights of Vukovar tour OR Vukovar bike tour
• Croatian wine tasting

Explore Serbia's capital, Belgrade, on a city tour, which includes the Kalemegdan Fortress and the Serbian Orthodox Temple of St. Sava. Later, choose from three intriguing excursions. Visit the Royal Palace, the official residence of the Serbian Royal Family; and then tour the House of Flowers, the mausoleum of Marshal Tito, who became the first President of Yugoslavia. Or enjoy a taste of the region by sampling Serbian plum brandy, Šlivovitz, and delicious local delights at the Quburich Distillery. For those wishing a more active adventure, join a guided bike tour or hike to Belgrade Fortress. (B/L/D)

Excursions:

• “The City by Two Rivers” tour
• Royal Palace and Tito's Memorial tour OR Quburich Brandy tasting OR Belgrade Fortress hike OR Belgrade bike tour

The Iron Gates is one of Europe's most aweinspiring natural wonders. The Danube narrows as it winds through a series of magnificent gorges between the Carpathian and Balkan mountains, forming a natural border between Serbia and Romania. The ancient Serbian king Decebalus is proudly carved into the mountainside and always captivates travelers. (B/L/D)

Excursions:

• Full-day scenic cruising

Explore Vidin, one of Bulgaria's oldest cities, and surrounding areas with a choice of excursions. Discover Baba Vida Fortress, the largest preserved medieval castle in Bulgaria. Continue on to Belogradchik, one of Bulgaria's natural wonders, where you can hike around its most spectacular rock formations. Alternatively, visit a local home for a demonstration of traditional Bulgarian yogurt and Banitsa, a pastry you will also get to make. You also have the choice to bike through Vidin and to the castle. (B/L/D)

Excursions:

• Baba Vida Fortress and Belogradchik with choice to hike OR Banitsa pastry and yogurt tasting OR Vidin bike tour

Visit Bulgaria's ancient capital, Veliko Tarnovo, with its medieval fortress and multiple orthodox temples. You can opt instead to go to Rousse, known for its 19th- and 20th-century Neo-Baroque and Neo-Rococo architecture, and then afterwards visit the UNESCO-designated Rock-Hewn Churches of Ivanovo with frescos revealing exceptional artistry of 14th-century paintings. Later in the day, travel through the Romanian countryside to the capital of Bucharest, known as the “Little Paris of the East.” Enjoy a panoramic tour of the historic city center and its elegant architecture, followed by a visit to the Palace of the Parliament, the second largest administrative building in the world. (B/L/D)

Excursions:

• Veliko Tarnovo excursion OR Rousse walking tour and Rock-hewn Churches tour
• Bucharest excursion

Disembark the ship in Giurgiu and board a motorcoach to journey through the Romanian countryside to Bucharest where you'll board your flight to Istanbul. (B)

Excursions:

• Flight to Istanbul

Allow yourself to be led through Istanbul's fascinating Old City, with its numerous Roman, Byzantine and Ottoman monuments. Admire the mighty defensive walls, the Roman aqueduct and the hippodrome, among other iconic sites. (B)

Excursions:

• City tour

Admire the grandeur of the spectacular Ottoman Sultans' Grand Palace of Topkapi, home to every Sultan from the 15th-19th centuries. During your tour, marvel at the private chambers of the Sultans, the Harem (women's quarters) and the Imperial Treasury's vast collection, including the jewel-encrusted Topkapi Dagger and the stunning 86-carat Spoonmaker's Diamond. (B)

Excursions:

• Topkapi Palace tour

Bid farewell to Istanbul as you prepare for your flight home. (B)

Arrive in Vienna and transfer to your hotel.

The “City of Waltzes” offers a treasure trove of gems just waiting to be discovered on your city tour. See the majestic Opera House and the former Imperial Palace of the Habsburgs before concluding in Vienna's historic city center. (B)

Excursions:

• Imperial Vienna tour

Board the ship for your Gems of Southeast Europe cruise. During the evening, be treated to an Illuminations cruise. (D)

Excursions:

• Transfer to Budapest
• Queen of the Danube tour
• Embarkation
• Illuminations cruise
• Illuminations Cruise

Enjoy a scenic morning cruise to Mohács. You'll then visit Pécs, founded more than 2,000 years ago by the Romans. Visit the UNESCO-designated Christian Necropolis; St. Peter's Basilica, the city's main Catholic cathedral along with its catacombs; and Széchenyi Square, the heart of Old Town Pécs. You will also see the Mosque of Pasha Qasim the Victorious, one of the symbols of the city. Or for wine connoisseurs, you'll want to go to the Szekszárd wine region, one of the oldest red-wine-growing areas in Hungary, established more than 2,000 years ago. You may also take an exhilarating guided bike tour around Mohács. (B/L/D)

Excursions:

• Scenic cruising
• Pécs excursion OR Mohács bike tour OR Szekszárd wine tasting

Vukovar is a Croatian symbol of resistance, which you'll better understand on your city tour showcasing the Ovčara Memorial and Eltz Castle. Alternatively, choose a wine tasting in Ilok, a center of wine production since Roman times, where you'll sample its famous Grasevina, Traminac and Frankovka wines. Back on board, cruise to Novi Sad, sometimes called the “Serbian Athens.” Discover Novi Sad on a walking tour to Dunavski Park and through Stari Grad, the Old Town center. If you prefer a more active exploration, join a guided biking tour or hike through Fruska Gora National Park. During the evening, visit Petrovaradin Fortress, a mighty stronghold no enemy has ever breached. (B/L/D)

Excursions:

• Full-day Novi Sad tour OR Highlights of Vukovar tour OR Vukovar bike tour
• Croatian wine tasting

Explore Serbia's capital, Belgrade, on a city tour, which includes the Kalemegdan Fortress and the Serbian Orthodox Temple of St. Sava. Later, choose from three intriguing excursions. Visit the Royal Palace, the official residence of the Serbian Royal Family; and then tour the House of Flowers, the mausoleum of Marshal Tito, who became the first President of Yugoslavia. Or enjoy a taste of the region by sampling Serbian plum brandy, Šlivovitz, and delicious local delights at the Quburich Distillery. For those wishing a more active adventure, join a guided bike tour or hike to Belgrade Fortress. (B/L/D)

Excursions:

• “The City by Two Rivers” tour
• Royal Palace and Tito's Memorial tour OR Quburich Brandy tasting OR Belgrade Fortress hike OR Belgrade bike tour

The Iron Gates is one of Europe's most aweinspiring natural wonders. The Danube narrows as it winds through a series of magnificent gorges between the Carpathian and Balkan mountains, forming a natural border between Serbia and Romania. The ancient Serbian king Decebalus is proudly carved into the mountainside and always captivates travelers. (B/L/D)

Excursions:

• Full-day scenic cruising

Explore Vidin, one of Bulgaria's oldest cities, and surrounding areas with a choice of excursions. Discover Baba Vida Fortress, the largest preserved medieval castle in Bulgaria. Continue on to Belogradchik, one of Bulgaria's natural wonders, where you can hike around its most spectacular rock formations. Alternatively, visit a local home for a demonstration of traditional Bulgarian yogurt and Banitsa, a pastry you will also get to make. You also have the choice to bike through Vidin and to the castle. (B/L/D)

Excursions:

• Baba Vida Fortress and Belogradchik with choice to hike OR Banitsa pastry and yogurt tasting OR Vidin bike tour

Visit Bulgaria's ancient capital, Veliko Tarnovo, with its medieval fortress and multiple orthodox temples. You can opt instead to go to Rousse, known for its 19th- and 20th-century Neo-Baroque and Neo-Rococo architecture, and then afterwards visit the UNESCO-designated Rock-Hewn Churches of Ivanovo with frescos revealing exceptional artistry of 14th-century paintings. Later in the day, travel through the Romanian countryside to the capital of Bucharest, known as the “Little Paris of the East.” Enjoy a panoramic tour of the historic city center and its elegant architecture, followed by a visit to the Palace of the Parliament, the second largest administrative building in the world. (B/L/D)

Excursions:

• Veliko Tarnovo excursion OR Rousse walking tour and Rock-hewn Churches tour
• Bucharest excursion

Disembark the ship in Giurgiu and board a motorcoach to journey through the Romanian countryside to Bucharest where you'll board your flight to Istanbul. (B)

Excursions:

• Flight to Istanbul

Allow yourself to be led through Istanbul's fascinating Old City, with its numerous Roman, Byzantine and Ottoman monuments. Admire the mighty defensive walls, the Roman aqueduct and the hippodrome, among other iconic sites. (B)

Excursions:

• City tour

Admire the grandeur of the spectacular Ottoman Sultans' Grand Palace of Topkapi, home to every Sultan from the 15th-19th centuries. During your tour, marvel at the private chambers of the Sultans, the Harem (women's quarters) and the Imperial Treasury's vast collection, including the jewel-encrusted Topkapi Dagger and the stunning 86-carat Spoonmaker's Diamond. (B)

Excursions:

• Topkapi Palace tour

Bid farewell to Istanbul as you prepare for your flight home. (B)