This striking memorial is one of Estonia’s most controversial Soviet leftovers.

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

An underground nightclub helped spark a "Singing Revolution."

Relics from an era long gone, sit idle outside this Estonian museum.

A secluded art gallery hidden within the cellars beneath Tallinn’s medieval monastery.

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

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

Ripped apart by a bomb in 1993, the shell of Pablo Escobar's infamous vacation house still stands.

A sprawling museum filled with larger-than-life works of art.

Toss a Frisbee through the ruins of this Colorado gold mining town.

The old Route 66 town straddling Texas and New Mexico died along with the Main Street of America.

Elevated freight railway turned wildly successful urban park.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

A tiny, remote island packed with wonders both natural and geeky.

This former estate of a fascist leader is now a burnt out ruin leading to a system of secret tunnels.

The now-overgrown beach resort was once frequented by Yugoslav military elite.

The farthest you can be in the contiguous U.S. from a McDonald's location.

This old steel industry company town has a tradition of parking cars on the sidewalk so people can walk in the narrow streets.

This subterranean disco dance club in a Cuban cave comes with bright lights and a dark legend.

The ruins of a lighthouse on the island Amelia Earhart never reached.

Don't blink or you'll miss it.

This overgrown Illinois water park offers a whole new type of adventure.