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.

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

Decades before the scandal, this staircase on the river was a literal "water gate."

The preamble to the U.S. Constitution written entirely from vanity license plates hangs in the Smithsonian museum.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

The national park was once a plantation estate.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

At 207 feet, one of the world's longest continuous escalators.

An amazing example of early-20th-century architecture, this church features marble transported from Utah.

The United States Capitol's former columns still stand.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

Giftshop catering to cryptozoologists and anyone with a sense of humor.

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

A haunting tribute to pioneering photographer Clover Adams.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

A museum dedicated to exhibiting remarkable outsider art.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

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

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

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

A hidden alley in urban Baltimore is a haven for graffiti artists.