Eighty million natural history specimens call this gargantuan museum home.

Mysterious 500-year-old tapestries depict a unicorn hunt.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

This knobby, drooping New Orleans oak is a favorite place both for climbing and for meeting giraffes.

The curiosities and wonders of pharmacy in a delightful historic building.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

This frequently-photographed waterfall takes only a short hike to visit.

A vast overgrown cemetery, once known as one of London's "Magnificent Seven."

The magical, mossy forest that inspired Princess Mononoke.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

An underwater city for the dead.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

The hidden lair of an alchemist rediscovered in a 2002 flood.

A castle that was built stone by stone by an eccentric journalist.

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

An unusual round church in London with a Templar past.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

A heavenly experience, right here on Terra Firma.

The real life Hobbiton, this sheep farm has been forever transformed since being built for The Hobbit film series.

This abandoned amusement park was built on a site with a dark history.

Odd outsider art installations surround a Gold Rush-era ghost town.