This slender three-story building has also had several famous residents.

Play heads or tails with thousands of different coins.

This simple Manhattan salt house is artfully shaped... well, like a giant granule of salt.

Manhattan's Thirteenth Avenue was made on landfill then deliberately destroyed — apart from one small, obscure block.

Captain America, Sub-Mariner, and the Human Torch were all born in this art deco Manhattan masterpiece.

Manhattan's deadly West Side railroad, which killed hundreds of New Yorkers, is remembered by this simple plaque.

Twenty-three trees, each paired with a basalt stone, line a street in Chelsea, continuing an urban project started by German Fluxus artist Joseph Beuys.

A dilapidated dock tells the story of Titanic's missed arrival.

This historic building housed the surviving crew members of the Titanic, who were left destitute after the wreck.

Built in 1945, this historic train station has a new lease on life with its baggage area serving as an event space.

A tribute to the beloved, kind-hearted "homeless mayor" of Silver Spring.

Giant acorn-shaped 19th century gazebo from which suburban Washingtonians gazed upon the original "silver" spring.

The rooster who crossed the road lives on forever in Takoma Park, Maryland.

A benevolent, 16-foot-tall river dragon lives on a suburban lawn.

A haunting tribute to pioneering photographer Clover Adams.

A memorial to a shareholder activist feared by CEOs around the United States.

Home to two notable early-20th-century Black educators, Lucy Slowe and Mary Burrill.

This historic building is now home to the Public Access Corporation for the District of Columbia.

The towering figures were created from the cemetery's fallen old-growth trees.

This grisly headstone doesn’t seem to be resting in peace.

An Industrial Revolution-era public work that purified water using nothing but sand.

One of the first Second Empire-style buildings constructed in North America.

An overlooked oasis of quiet on the grounds of Washington's monumental basilica.

Largest Roman Catholic church in North America.