Volcanic stone sentinels stand watch at a Korean Bell Garden in Virginia.

A building shaped like the Army Corps of Engineers logo, because why not?

These recently uncovered walls are all that's left of Washington, D.C's first defense contractor.

A derelict bit of transportation infrastructure hidden in the woods.

"Bite or Smite" became the unlikely mascot of a Tampa suburb.

These abandoned waterworks are crumbling into the Potomac River.

The span is crooked and made from two older recycled bridges.

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

This historic boathouse was constructed using salvaged lumber from burned barns.

A tribute to a future time when gravity is conquered.

These former theme park figures have a new lease on life outside a water plant-turned-restaurant.

An oddities shop that dabbles in the deathly and beautiful.

A tiny, unassuming park in Tampa that belongs to the Republic of Cuba.

Built in 1815, the stabilized ruins of the grist mill and sawmill are now gated, but interpretive displays on the features and functions of the mill preserve its history.

This abandoned Victorian-style house was built in 1884.

The only public school for Black children in the region from 1895-1936.

Once the center of a thriving early Black community called Martinsburg.

Dating to 1793, this is the oldest building in Poolesville.

Using a massive antenna made up of five miles of wire, two scientists tuned into organic radio waves from the planet Jupiter.

The oldest surviving one-room schoolhouse in Montgomery County, Maryland.

A massive white oak tree provides a beautiful canopy near a suburban shopping center and stood before the signing of the Constitution.

The "lovely red Vega" of the legendary record-settling pilot.

An eccentric company offers eccentric millionaires the opportunity to have spaceflight-related experiences.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.