Home to items never before seen by the public.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

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

This pun was simply waiting to come to life, and one defense contractor made it so.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

The final resting place of the tragic king and queen of the Jazz Age is tucked away in a small Maryland graveyard.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

At 207 feet, one of the world's longest continuous escalators.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

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

The patron saint of spinsters grasps a container of dried blood.

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

These blingy, baubled skeletons lie in glass boxes inside a baroque Bavarian church.

This magnificent museum claims to house the cranium of a disciple and the skull of a pope.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

The footprint of a frustrated devil in Munich's Cathedral.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

A haunting tribute to pioneering photographer Clover Adams.

The site of the climactic scene from the classic horror film is now a historic landmark.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.