This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.

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

While not recognized by Guinness, this chocolate waterfall is likely to be the world's largest.

Buy your friend a drink or staple some cash to the wall for the next guy at the Salty Dawg Saloon.

A high school astronomy enthusiast designed this model of our solar system to be traversed on foot.

On the right bank of the Grand River a plaque remembers an imaginary painter who once awaited his youth.

An angular maze of concrete in Grand Rapids acts both as public art and as a staircase for fish traveling upstream.

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.

A popular European tradition makes its way to the states on one of America's most famous bridges.

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.

Elevated freight railway turned wildly successful urban park.

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

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

An artist's cute bronze subway sculptures belie his violent artistic past.

The romance of early commercial flight still fills this Art Deco destination.

Right next to departures—how convenient!

The remains of a historic plantation nestled in between a parking lot and the rental car return at Reagan National Airport.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

A house of courtship where the Jazz Age's most storied lovers got their start.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

A little piece of Paris in the sultry south of the U.S.

A small triangle of DC grass is the final resting place of one of Sonny and Cher's songs.

This too-low North Carolina railroad trestle is still a notorious big rig executioner.

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