This tunnel looks like a sliver of Shanghai that's stuck in the past.

A lush desert oasis in the shape of a narrow crescent.

Natural arch offers panoramic views of Yangshuo's karst hills.

270 million year-old forest of stone.

Ancient artists in the middle of nowhere.

Neo-cave art on the macro scale.

After the Cuban Revolution, the famous rum company had to leave their swanky headquarters behind.

Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

Castro's communist ice cream mothership has been serving five-scoop "salads" for over 50 years.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

This fort dates back to 1588 and was colonized by the Portuguese, Dutch, and English and sits prominently on the Indian Ocean where azure water lap the coast.

This ancient cave temple complex is the largest and best-preserved temple complex in Sri Lanka.

Known as the most scenic route in Sri Lanka, this train line is steeped in history and offers an unparalleled view of the country.

Huge herds of Asian elephants can be seen walking, bathing, and just chilling at this Sri Lankan park.

This elaborate temple was built around one of the Buddha's teeth.

An ancient stone fortress considered by many to be the eighth wonder of the world.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

This house's itty bitty size means no humans allowed.

This massive fiberglass Gulliver turns every visitor into a Lilliputian.

Did Inca children also slide down these smooth rocky slopes above Cusco?

The Uros people live on floating reed islands in lake Titicaca.

A remote candy-striped mountain in the Peruvian Andes straight out of the pages of Dr. Seuss.

A painting in the historic Cathedral Basilica depicts Jesus and his disciples dining on a traditional Peruvian menu.

Situated on a sacred Inca site, this 16th-century cathedral took nearly 100 years to build.