This World War II bunker now survives as a documentation of the Nazi regime and war crimes.

A small but immensely extravagant palace built by the "Night King."

The fairy tale castle of the "fairy-tale king."

The last Tsar of Russia constructed this private church just so he could attend services when visiting his wife's hometown.

Tiny castle in the middle of the Rhine made you pay to pass.

This former Nazi castle was built as a school to train what would have been the future of the Third Reich.

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

A university observatory dome painted to resemble the beloved 'Star Wars' droid.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A hand-built folk art installation covered with messages of God's love.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

Most-visited and most-photographed slot canyon in the American Southwest.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

Science fiction's grandfather has a fittingly marvelous tomb.

This modern French ossuary contains the jumbled bones of 130,000 WWI soldiers.

Statue of a decomposing prince that once held his heart in its hand.