This was the second largest mercury mine in the world and one of the oldest preserved mine complexes in Europe.

The location of the Bridge of Death and the Gorge of Eternal Peril in "Monty Python and the Holy Grail."

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

On this stunning Scottish island, you can walk in the footsteps of dinosaurs.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

These fantastically named natural pools look like something out of a Scottish myth.

One of the most iconic neon ads of former East Germany.

Naturally formed rock city in Poland.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

Crammed inside this grounded passenger plane is a bar that was once a Communist hang out and is now a ratty relic.

A former top secret nuclear fallout shelter now operates like a hotel stuck in the Cold War.

This arid landscape was once a lush wetland. Today, it's a paleontological site filled with fossilized mammoths, sabertooth cats, and more.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

In the middle of the desert, miles from any human life, sat an anomalous pay phone that still magically answers your calls.

The most isolated mailbox in America lets desert travelers record their passing.

The damming of the Colorado River buried an iconic geologic formation before record-breaking drought brought it back.

This bomb shelter-themed bar has barely changed since it opened.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

Legend says train robbers stashed their gold within the depths of this unusual cave.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

This sanguine boulevard was named after a deadly cowboy bar fight.

An artificial crater field that trained astronauts for lunar exploration.

An urban laboratory.