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

You could be standing at the site of one of D.C.'s most fatal tragedies and not even know it.

An elegant chandelier hangs over this ancient sewer chamber, now open for concerts and public tours.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

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

This poor little statue is the most vandalized memorial in Washington.

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

There’s a special club house at the top for the bell ringers.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

One man's ambition created this psychedelic log home.

An abandoned stretch of highway, deteriorating next to the operational one.

A historic house in St. Louis was plagued by a series of suicides committed by family members involved in a successful brewery.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

The site of the climactic scene from the classic horror film is now a historic landmark.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

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

Scattered throughout London are ancient remnants of the city's former bounding wall.

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

A historic presidential getaway on the continental United States' southernmost island.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

Salute the leader of the proletariat.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.