For almost 100 years, this site of peace and spirituality has existed on the California coast.

Get past the gatekeeper's apartment and enter an elaborate hoax of a restaurant with a Masonic feel.

A lighthouse on this West Virginia lake started as a joke, then the forces of nature helped make it a reality.

The only geyser in the state of Pennsylvania is caused by pressure from an abandoned coal mine outside of the ghost town Centralia.

An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

The sole remaining outpost of a once-thriving South Carolina chain still sells “pic-a-nic” baskets.

These red marks, seemingly placed at random, are in fact not.

An aluminum skeleton brings Chinese mythology to the French shore.

More gold than anywhere else, ever.

One of the only places where Earth’s mantle lies above water.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

This colorful West Virginia cowboy greets passersby with a glassy stare.

One-of-a-kind museum inside the first Boeing 747-400 ever made.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

The center of the only hemisphere that awards visitors with a commemorative coin.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

Vikings and Evangelicals have both had a hand in this replica medieval church.

A remnant of the last Ice Age, this lake is surrounded by fascinating rock formations.

An abandoned observatory in the middle of the Illinois prairie.

This field of concrete was once an active defense site armed with nuclear warheads.

These massive concrete balls were used to mine gold in Virginia.

Museum deep in the catacombs of St. Michael the Archangel Church is explored by touch, sound, and smell.

It took more than 300 years to build this church, which is home to two sacred vessels believed to hold the blood of Christ.