Empires of the Lower Danube (2028) - 9 days Belgrade to Bucharest

Your first stop is Golubac Castle, one of the best-preserved medieval fortresses in Europe, a powerhouse that has loomed over the Danube for centuries.

Later you'll visit Lepenski Vir which is one of the largest and most significant prehistoric archeological sites from the Stone Age, located on the Danube. It was once the epicenter of one of the most highly developed prehistoric cultures, with complex social relations and even rudimentary urban planning. The discovery of this prehistoric settlement has changed the image experts once had about the early Stone Age, expanding scientists’ knowledge about human communities that walked the earth millennia ago.

Take in the breathtaking landscape of Djerdap National Park, where rolling green hills rise above a stretch of calm Danube waters. We’ll set out on an easygoing hike, approximately half a mile each way, to the best vantage spot in the park: the Kovilovo Viewpoint. This spacious outlook presides over an impressive portion of the Danube that is about a mile wide.

Drive through the scenic Bulgarian countryside to Belogradchik, a small town in the foothills of the Balkan Mountains, not far from the Serbian border. After some light refreshment at a local hotel, you’ll be ready to explore the astonishing rock formations nearby, which are over 200 million years old—and have inspired nearly as many legends! Many of the strange wind- and weather-hewn shapes have names, such as Adam and Eve, the Bear, and the Castle. The outcroppings formed a natural defense for the town that was enhanced with man-made fortifications over the centuries. Whether you choose to hike with a local expert to the top of the path or not, you’ll be rewarded with spectacular views. Your return will take you past some sights that highlight Vidin’s mixed heritage: the Orthodox cathedral, the Turkish mosque, the Konak (the 18th-century headquarters of the Turkish police), and the cruciform barracks (which date to the 1790s). The final stop will be Baba Vida, whose stern 10th-century stone walls were built on the site of a Roman watchtower.

Bucharest began as a fortress in the 15th century, a warlike origin that set the tone for its turbulent history. It saw glory days as the summer residence of the Wallachian princes and was burned to the ground by the Ottoman Turks; then Austria-Hungary and imperial Russia fought over it for a century. After Wallachia and Moldavia united to form Romania in the mid-19th century, Bucharest enjoyed a prosperity that was reflected in its extravagant architecture, some of which miraculously survived WWII bombing and Communist building programs.

You’ll see Bucharest’s very own Triumphal Arch, which is modeled after the Arc de Triomphe in Paris, and Victoria Boulevard, lined with chic shops and handsomely restored pre-war buildings—and sites where protests brought down Ceaușescu’s regime in 1989. These days Bucharest enjoys a lively and eclectic cultural scene, hosting international arts festivals and concerts, and a measure of prosperity apparent in its busy cafés and thriving street life.

For the most dazzling stop of the day, you’ll visit the colossal People’s Palace, the second largest office building in the world. It’s certainly one of the grandest as well, filled with crystal chandeliers, mosaics, marble, gold leaf, and stained-glass windows. A remnant of the city’s communist history, the building’s original design took a team of approximately 700 architects and was inspired by Socialist Realism, Modernism, and Neoclassical architecture. Though the People’s Palace was ordered by Nicolae Ceaușescu, the last communist leader of Romania, it was not completed until 8 years after his death. The Palace now houses the Romanian Parliament and three museums, including a contemporary art museum and the Museum of Communist Totalitarianism.