This former medieval prison now unlocks Estonia’s rich photographic history.

"There's nothing there," and other lies the KGB told us.

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.

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

A magnificent waterfall nestled in the heart of the El Yunque National Forest.

This huge pile of volcanic boulders hides a stunning network of secret grottoes.

Swim or sail to this pie-slinging boat off the coast of St. Thomas.

Rumored to be the famed pirate's lookout tower, this historic stone structure is now just watching for tourists.

It may look like no more than a full-scale model, but every part of this full Space Shuttle stack had a working role in aviation history.

This 12-foot-tall T-rex is the largest K’Nex skeleton sculpture in the world.

Only a fragment of this 15th-century Dance of Death survives today.

This medieval Estonian tower provides access to a series of tunnels that have been home to soldiers, punks, and fine art.

Estonia's largest creative city is a vibrant bohemian hub located within a former industrial complex.

Disused seaplane hangar gets a second life as the jaw-dropping home of Estonia's museum of maritime history.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.