The abandoned Bermudian home of a British naval leader is surrounded by crumbling sporting fields and the graves of convicts.

In Bermuda, this formal naval residence has become a go-to for cliff-jumpers and hikers.

Tiny horses tethered to antique rings are scattered around the city.

The rogue roots are gradually consuming some of the historic marble grave markers.

The final resting place of up to 6,000 Confederate soldiers, the largest mass grave in the Western Hemisphere.

A small Richmond island dotted with the remnants of hundreds of years of history.

Beyond being incredibly fun, not much can be said about the Hole with certitude.

The Pentagon sits on a former island that was in Virginia at low tide and D.C. at high tide.

Every drop of D.C. tap water flows through this old waterworks.

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

Before Nixon, "watergate" meant canals.

A portal into the bricked up canal that runs through the heart of Washington D.C.

How this Pine Barrens hill got its name is uncertain, but on a good day the view from the fire tower is crystal clear.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

In the woods of New Jersey lie the ruins of a munitions village abandoned after World War I and the remnants of a 1920s wooden racetrack.

Remember that scene in the Matrix, when Neo is in the big white room with all the weapons flying by? Well, this is what it would look like if he had wanted trees instead of guns.

A stunning landscape of bunkers that once stored chemical weapons.

Legend says that these tall basalt pillars are the petrified wives of a trickster god.

A 1940s nuclear reactor built to produce plutonium for the Manhattan Project.

Perhaps the world's only gas station inspired by a political scandal.

A plaque commemorates the spot in the Oregon woods where the first-ever Geocache was hidden.

Storms, funding, and in-fighting have kept this Bermuda church from ever being completed.

A tropical paradise once home to space exploration and military installations.

The strange phenomenon causing gravity to "work backwards" on this hill has been blamed on the paranormal.