The FBI's urban training course may have the highest fake crime rate in the world.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

A convincing little bit of ancient Egypt smack dab in Richmond, Virginia.

An extensive, if one-sided, history of U.S. law enforcement's war on drugs.

Take an otherworldly journey in a school dedicated to out-of-body experiences.

A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.

The flower-shaped temple in Virginia aims to transcend the boundaries of the world’s religions.

A collection of oddities including Dr. Kevorkian's suicide device, the Thanatron.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

A ceramic-tiled room at the Seelbach Hotel said to have secret tunnels used by Al Capone and a crowd that helped inspire F. Scott Fitzgerald's 'The Great Gatsby.'

A theme park featuring a replica of Noah's Ark built to the measurements specified in the Bible.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

One of the few surviving "Wigwam"-themed motels.

Inspired by a piece of concrete, these three pyramid-shaped buildings have been beloved Indianapolis landmarks for over 50 years.

The evolution of recreational vehicles and motorhomes is on display in the “RV capital of the world."

A turn-of-the-century architectural marvel built on healing mineral springs and salt licks.

The site of a 19th century "dream city" that almost rivaled Chicago before being swallowed by the Indiana sand dunes.

Symbolic attempt to overcome the issues of life.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

The longest navigable underground river in the United States is home to countless blind and albino animals.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

It's hip to be square in Iola, home of the largest town square in the United States.

Massive still life just off the highway in Kansas.

One of the Eight Wonders of Kansas and the first official National Natural Monument these stark formations look like nature's Stonehenge.