You feel like you're in a forest, but you're actually walking amidst the branches and trunks of a single giant tree.

A shrine-like museum entirely dedicated to soccer superstar Cristiano Ronaldo.

Walk in the footsteps of the gods and straddle two tectonic plates.

An encyclopedic collection of mammal penises.

The Sun, Moon, and stars peacefully coexist with animals, humans, and their tools at this surprising sculpture park.

A pocket of jungle amidst urban expansion in Panama.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Men in rubber-soled boots serve as your "brakes" on this toboggan ride Hemingway described as "exhilarating."

Budapest's Communist-era statues, banished to the suburbs.

Museum dedicated to the terror regimes of Hungary.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

Once the home of a hermetic monk, this cave now houses a small church.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

This former lieutenant governor's home is brimming with curiosities.

Elaborate tile work in this railway station tells the story of Portugal.

A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.