This former railroad bridge was named after the great river that once flowed below it.

Rusting, graffiti-covered tanks litter the beach of this island, once used by the U.S. military for target practice.

A park where people have been going to feed friendly pigeons since the 18th century

A former pyramid-shaped library with colorful murals lies just across the bay from Old San Juan.

This restaurant has been a haven for D.C.'s LGBTQ community since the 1950s.

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

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

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

A historic neighborhood church is reborn as a psychedelic arts collective.

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

A famed data visualizer's personal sculpture garden is a landscape of modern and megalithic wonders.

A field of nothing but boulders which resembles a giant's gravel driveway.

This locally-famous crevasse in New York State is icy all year round.

A parade of antique steeds offers a quirky ride through history.

The largest known open fault in the United States is basically a giant natural refrigerator.

The world's largest kaleidoscope, designed by a 1960s psychedelic artist.

This old cement mine has been used as everything from a mushroom farm to a recording studio.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

These conical kilns measure an impressive 30 feet in diameter, and were once used to produce charcoal for a local blast furnace.

Trash escaped from a landfill to fill beaches with all kinds of treasure.

This small shop walked so America could run on Dunkin'.

Colorful clay cliffs tower over an unofficial nudist beach on Martha's Vineyard.

A quirky collection of outsider art made from automobile parts.

This stunning gothic ruin was a casualty of the Indiana steel industry crash.