These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

A medieval church built into an ancient cave.

Trek into the depths of the cave where 17,000-year-old paintings exist alongside 400-year-old graffiti.

The remains of a 19th-century carving of what was to be a signal light on the Firth of Forth Estuary.

A pub that is literally in the middle of nowhere, but continues to do business.

A legendary ghostly hound supposedly left dark marks on a place of worship.

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

One of the oldest temples in Ho Chi Minh City, dedicated to a deified Chinese military leader.

This museum of Hawaiian and Polynesian culture is the legacy of the last descendant of the Kamehameha Dynasty.

The world’s largest underground marble quarry is hiding in Vermont.

Thailand's distressed elephants find peace at this Chiang Mai sanctuary.

This "City of Books" holds a museum, library, and the complete personal book collections of five of Mexico's greatest thinkers.

Sloth rehabilitation center in the jungle of Costa Rica.

A no-frills, DIY nature preserve manned by a U.S. expat who has dedicated his life to turtle conservation.

The train platform where Jews were sent to concentration camps is now preserved as a Holocaust memorial.

This ancient theater, restored in the 20th century, lives on as a venue for dramatic and musical performances.

Traditional 15th century Chinese garden in the middle of Vancouver.

An abandoned Jewish sanatorium is tucked within the woods of Poland.

Monumental sculptures guard many of the graves, transforming this necropolis into an open-air fine art museum.

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

The tallest city hall in the world offers an excellent bento box.

American soldiers discovered Europe's best one-liner at the end of World War II.

An eerie, derelict amusement park in Berlin.