Closed for decades, this strange symbol of Japan's Expo '70 has finally opened its psychedelic insides to the public.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

This former Welsh metal factory is now a lovely abandoned relic but was once one of the industry's world leaders.

The gilded vestiges of a sterling department store can still be found in a Brooklyn shopping center.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

Abortion, prohibition, religion, war, and fear all play a part in the history of this idiosyncratic Pacifica castle.

Hidden in one of New York's oldest subway stations is the final remnant of the site of the bizarre Shakespeare Riots.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

A once crucial portion of the Long Island railroad still lays abandoned, waiting to be turned into an urban park.

The ancient settlement attracts tourists from all over looking to learn about the Chinese vision of the afterlife.

The highest bridge in America was built for an almost unnervingly small amount of money.

Legend says these rocks used to be hunting dogs, a story that may have inspired Sherlock Holmes' most famous case.

This modern monument to pagan belief looks like it was transported straight from ancient times.

This picturesque cliffside beacon no longer calls to sailors but shines once a year in honor of a famous shipwreck.

This tumultuous Icelandic lava field looks so alien European researchers want to use it as a stand-in for Mars.

This small group of sand dunes manages to pack in a strange rainbow of colors.

The life of one of FDR's possible mistresses is preserved in her palatial Hudson Valley mansion.

A church of bones, decorated with 40,000 human skeletons.

What was once the largest mine in North America has left behind a hollow hill filled with bright blue waters.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

Fortified homes of highland warriors that are still in use today.

While only two of the ancient buildings at this site are actually churches this was one of the earliest Irish pilgrimage sites ever.