One of the most influential presidents in U.S. history wanted only this plain, elegant monument as his lasting memorial.

This sandwich shop has a century-old elevator behind a sheet of plexiglass.

A much-maligned monument to teetotalism.

The tunnel under the Capitol Building where Congress takes out its trash.

After his presidency, George Washington planned to live only a few blocks from the Capitol building.

One of the last schoolhouses constructed in the early 20th-century still standing in Montgomery County.

This suburban park recalls the history of a famous tavern. Despite the name, it's no ordinary place!

This propitious plastic porcine has been petitioning park visitors to pick up after themselves for more than 50 years.

Three abandoned missile silos are hiding in plain sight behind a suburban development in Maryland.

This small cemetery remains hidden behind a recreation center.

The whole world in one water tank.

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

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

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

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

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.

This ruined quarry once produced the distinctive red sandstone used for construction projects in Washington, D.C.

One of the oldest standing structures in Montgomery County, Maryland.

This suburban house is made of dirt, and almost sparked a revolution in home construction.

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

Surrounded by traditional homes, this Tolkien-esque dwelling stands out on a quiet street in suburban Maryland.

The last remains of the extinct Beothuk people native to the island of Newfoundland.

This small Newfoundland town has declared itself the “Root Cellar Capital of the World.”