Giant naked man on a hillside.

The small cliffside monastery known as the Tiger's Nest is said to be the meditation site of an 8th-century Buddhist master.

The world's second largest salt mine, said to have been discovered by Alexander the Great's horse.

Ancient Greek oracle of the dead.

Every equinox this Maya pyramid puts on a spooky ancient light show.

The floor of the oldest surviving synagogue in the Americas is entirely covered in sand.

A park full of outsider art, created by college students studying outsider art.

This skewed English house has looked like it's going to fall over for centuries.

One of England's most famous churches hides a pair of little known architectural treasures.

This replica stave church looks like a piece of Norway was simply plopped down in South Dakota.

This impressive collection of rare books on ancient mysticism inspired author Dan Brown.

A Catholicism-themed restaurant where sacrilege is on the menu.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

This controversial museum includes such detested exhibits as a chocolate suicide bomber and fecal-smelling digestion machine.

A medieval church with largest and oldest collection of Renaissance frescoes in France.

This whimsical seashell-shaped place of worship was designed to blend into its surroundings.

The whimsical twist of this spire was either caused by the Devil, an unexpected virgin, or lead.

This Detroit ruin was once a gothic bastion of its community, but now it stands as a haunting ruin.

The world's oldest Jewish library was founded by Sephardic Jews in 17th century Amsterdam.

A historic neighborhood church is reborn as a psychedelic arts collective.

The 16th-century church has the only stained glass windows that survived the Scottish Reformation intact.

Nature and religion are reunited at this unconventional church in the forest.

Mongolian Buddhists believe this monastery in the Gobi desert to be the center of the world's spiritual energy.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.