Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

Baltimore's classic clock tower was once topped by a rotating, 20-ton medicine bottle.

Meet some of the most prominent figures in Black history through life-sized wax models.

Once America's tallest structure, now a Baltimore landmark.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

Disks are rolled out onto the south lawn to absorb the impact of Marine One's wheels like giant coffee coasters.

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

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

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

A much-maligned monument to teetotalism.

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

Fittingly, America's museum of architecture is itself a magnificently designed old building.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

Featuring the the longest lift span of any vertical-lift bridge in the world.

This evocative New Jersey statue memoralizes the Polish victims of a Soviet massacre.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

A bronze plaque at an intersection in Hoboken marks the place where the game of baseball first took shape.

On the Hudson resides one of the largest clocks in the world.

World Trade Center memorial likened to a woman's sexual organ.

The highest point in New Jersey is marked by a massive, if simply named, obelisk.