This stunning waterfall is the backdrop to a site that has seen continuous human habitation for 250,000 years.

It takes a nine-mile hike to reach these hot springs, but weary hikers are rewarded with stunning views and a warm soak.

Metal dinosaurs lurk in a sculpture garden on the outskirts of a popular resort town.

A Victorian marvel of engineering is now a 21st-century tourist attraction.

Chilly air billows out from the entrance of an abandoned mine on a steep hillside, providing a refuge for Ice Age fauna and flora.

A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

Part of a WWII submarine is lurking outside the Washington Navy Yard parking lot.

Home to over 300 antique cars and motorcycles, including Thomas Edison's Model A.

A stunning blue-green lake located in the Terskey Alatau mountain range.

The ruins of a 2,000-year-old Roman fishing village perched on one of the best beaches in Spain.

The symbolic center of Ireland, this summit also offers panoramic views of the countryside.

Georgia's answer to Easter Island immortalizes the nation's great poets, artists, and leaders in stone glory.

This lush 12-acre site was once named the finest Japanese garden in North America.

Buy your fish and have it cooked to order in this bustling, eight-floor seafood market.

A relic of the Cold War tucked away in the forested hills above Bratislava.

This beach provides a glimpse of the ancient seafloor without getting wet.

A miniature shrine in the busy corner of Tokyo's historic Broadway, honoring a sextet of unusual entertainment gods.

Two of the few remaining life-sized Greek bronzes were submerged in the sea for over 2,000 years.

A small alleyway lined with locally drawn scenes of nostalgic anime and cartoon characters.

Down this yellow brick road, visitors are treated to toadstool houses and massive mushroom sculptures.

A gorgeous mural outside a beloved D.C. restaurant pays homage to famous Black Americans.

Large, airy hallways hide within an impenetrable fortress that beckons urban explorers.

Dine amidst exotic plants at this former royal greenhouse.

The model behind the iconic 3D test model.