The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.

The naval commander’s proudest moment in battle is memorialized in this unique tomb at Arlington Cemetery.

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

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

An overlooked memorial honoring the local Washington residents who died in World War I.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

Look closely and you’ll notice that the color changes a third of the way up the tower.

When it comes to handsignals (and colonialism) rock always beats scissors.

The innocent intentions of this monument are somewhat lost in the sculpture's muscled imagery.

A bas relief commemorates the "Nuns of the Battlefield" who cared for soldiers on both sides of the conflict.

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

The sculptor was instructed to add “stallion attributes” to the general's bronze mare.

Go take a picture with the inventor of the daguerreotype photographic process.

A quiet memorial marks the spot where the victims of the Salem Witch Trials were executed.

Millions of numbers carved in glass represent the tattoos forced upon victims.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

A remnant of the original World Trade Center complex continues to serve as a commuter gateway.

This memorial honors thousands of enslaved Africans and their descendants who died in colonial New York.

World's first "penitentiary," meant to be humane, drove men insane.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

This restored house is like a time capsule of the president's unconventional inauguration.

This titanic java kettle is one of the many kitschy landmarks located along America's OTHER famous highway.

Prison made famous by The Shawshank Redemption has been out of commission since 1990.

It marks the spooky spot where the bodies of two young boys were found in the 19th century.