An Industrial Revolution-era public work that purified water using nothing but sand.

Beyond the usual stories that attend old prisons, this one has deep bloody undercurrents.

This abandoned sea fort has become an accidental bird sanctuary.

Remnants of a storybook amusement park hidden behind a strip mall.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

A star fort along the C&O Canal in western Maryland that protected America in three wars.

A local farm's collection of unusual structures from a now defunct storybook amusement park.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

An FDR-era tuberculosis sanatorium has stood abandoned in the suburbs of the U.S. capital for over 30 years.

An abandoned village that doubled as "The Hunger Games"' post-apocalyptic wasteland is up for grabs.

An intricately designed junk art house with four extravagant junk art cars hidden in the suburbs.

Once the supplier for noteworthy projects like the National Cathedral, this old brickworks now lies abandoned.

The United States Capitol's former columns still stand.

You could be standing at the site of one of D.C.'s most fatal tragedies and not even know it.

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

The ruins of this long-abandoned unsuccessful gold mine can still be found.

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

This abandoned amusement park was built on a site with a dark history.

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

This abandoned school has had many lives since the early 1900s, and all of them doomed.

This once-palatial plantation may have been the site where a draft of the Declaration of Independence was written.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

Within this lovely Richmond cemetery lie the remains of famous Virginians and some of Edgar Allan Poe's most beloved family and friends.

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