Sigiriya, in central Sri Lanka, is an ancient rock fortress and one of the country’s most iconic archaeological sites. Rising nearly 200 meters from the surrounding plains, the massive granite column is crowned by the ruins of a royal palace built in the 5th century CE by King Kasyapa.

Tunis' white-washed, blue-shuttered buildings hide a treasure trove of Arabic and Ottoman art. Inspect illuminated manuscripts from the Koran, follow the twists and turns of the fascinating old Medina (inner city), marvel at the ornate Palace of Dar Ben Abduallah and the magnificent Djamaa-Ez-Zitouna Mosque, whose 184 columns were "recycled" from the rocky ruins of Carthage.

Hot Springs, Arkansas has been drawing visitors for centuries, and it all starts with the water. The city sits atop a natural thermal spring system that produces nearly a million gallons of 143-degree water each day. These springs gave rise to Bathhouse Row, a stretch of eight historic bathhouses within Hot Springs National Park. Some, like the Fordyce Bathhouse, now serve as museums, while others still offer traditional thermal soaks.

Vilnius, the charming capital of Lithuania, is a city where historical grandeur meets vibrant modernity. The heart of Vilnius is its UNESCO-listed Old Town, one of the largest and most well-preserved medieval city centers in Europe. Wander through its cobblestone streets and admire the stunning Baroque architecture.

Oxford is best known for its world-famous university, but the city offers much more than historic college halls and ivory towers. Its skyline, shaped by spires and domes, hints at centuries of intellectual life. The University of Oxford dates back to at least the 12th century and includes iconic buildings like the Bodleian Library, one of the oldest libraries in Europe, and the Radcliffe Camera, a circular reading room that looks more like a cathedral than a place for quiet study.