Texas's oldest bakery serves authentic German pastries, including legendary strudel.

This scalding hot river was thought to be a myth until one geoscientist made it his quest to study the mystical waters.

A series of caves, tunnels, and wells filled with fascinating figures and symbols.

Experience park where visitors are told to expect the unexpected.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

This decommissioned nuclear power plant offers tours of its Communist-era control room and reactor hall.

The world's first nuclear power plant is open to visitors looking to role-play a meltdown.

This top secret Chinese military megaproject is the world’s largest human-made tunnel structure.

The largest catacomb system in the world.

One of South America's most exclusive resorts has a storied history dating back to World War II.

An English brewery transported to North Korea.

An old railroad grade built for the construction of Hoover Dam is now a recreational trail featuring several tunnels and sweeping views of Lake Mead.

A hidden slot canyon in the southern Nevada desert makes an unexpected oasis and scenic hike.

US-50 in Nevada is known as "the Loneliest Road in America," but this earlier iteration of the route is even lonelier.

A spectacular but little-known slot canyon in extreme northern Nevada, with sheer walls nearly 500 feet high and a perennial stream.

A stunning blue-green lake located in the Terskey Alatau mountain range.

The superstar of Cold War nuclear bunkers has been featured in countless films but is now barely operational.

An uninhabited village that preserves and documents rural architecture and an endangered way of life.

Iron Age runes and ruins hide in plain sight along this Portuguese beach.

The eerie remnants of an ancient forest were hidden under the sand for centuries.

Abandoned ships along a deserted beach feel like the set of a post-apocalyptic thriller.

In one of the hottest parts of the Mojave Desert, shallow bedrock forces the typically dry Mojave River to the surface in this canyon, providing a vital oasis for humans and wildlife.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

Obscure Freemasons still live in D.C.’s largest private residence.