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

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

A state-of-the-art medical facility from the Imperial era is now a derelict ruin.

Ruins of a German Castle on top of a towering stone pillar.

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

Started as a kitchen garden, now the second largest botanical garden in the world.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

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

A collection of artifacts from two worldwide industries that called Endicott, NY home.

An iconic steel and chrome diner from the 1940s left empty for nearly 20 years is in danger of being demolished.

Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.

The Grand Ole Opry's big voice came from a small home in rural Virginia where she was eventually buried.

The Virginia home of one of the signers of the Declaration of Independence is being preserved with a unique glass facade.

Collecting 700 years of mechanical death-dealing, the NRA's sprawling gun museum is a revealing testament to the American obsession with armament.

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

Parking garage where Bob Woodward met Watergate source "Deep Throat."

Inspired by a foil-wrapped potato, (seriously) the Markel Building has been deemed one of the 10 ugliest buildings in the world.

One street divides a single town that stands in two U.S. states.

This old-fashioned carhop restaurant gave the world the waffle cone.

The oddly shaped, steam-spewing building is now an art studio and gallery.

This historic mansion was built as a symbol of love between a husband and wife.

America's first public mental health facility.

This Virginia railway overpass is said to be haunted by a serial killer in a rabbit costume.

The ruins of this Thomas-Jefferson-designed mansion have been left to crumble since the Christmas Day they burnt down.