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

Washed out by the Johnstown Flood in 1889, the surviving portion of the original two-span bridge now resides at Fishing Creek.

Rumors persist that a bottle of whiskey is sealed within this Demijohn-shaped adornment.

An amazing example of Federal-period architecture, truly unique to this region of the state.

A monument marks the location of the first successful steamboat demonstration.

This general store is more than a century old and home to various oddities and antiques.

Built in the 1850s, this church was of the first five churches constructed in Harper's Ferry.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

Time travel with sweets across history at this research-based candy store.

A park full of outsider art, created by college students studying outsider art.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

A celebrity from the late Cretaceous period.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

A rotating cast of guys and dolls in front of a Washington, D.C. building.

People escaping slavery may have hidden inside a corpse vault.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

A derelict bit of transportation infrastructure hidden in the woods.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

A wondrous old library overlooking the nation's capital.

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

A historic neighborhood church is reborn as a psychedelic arts collective.

Long-abandoned trolley tunnels just a mile away from the White House are turning into an art space.

Home to items never before seen by the public.