‘Bush the old fire dog died of poison July 5th, 1869. RIP.’

An overlooked tribute to one of the most important peace deals in American history.

The only National Monument ever to go missing for nearly 50 years then resurface in a dump.

The system of air guns are fired off remotely to scare any trespassing avians.

A memorial dedicated to a highly decorated Marine and Korean War veteran, who also happened to be a horse.

This former Cold War missile control site played an important role in the creation of GPS.

An out-of-place Air Force radar dome is all that denotes this park as a former missile launch site.

Where pardoned turkeys once spent their all-too-brief final days.

An eccentric company offers eccentric millionaires the opportunity to have spaceflight-related experiences.

Volcanic stone sentinels stand watch at a Korean Bell Garden in Virginia.

A double agent hid information for the Soviet Union beneath this bridge for more than 20 years.

D.C. once had its own tiny rival to the New York Stock Exchange.

A portal into the bricked up canal that runs through the heart of Washington D.C.

A historic ruin just 20 feet away from a busy highway onramp.

Before Nixon, "watergate" meant canals.

A rotating cast of guys and dolls in front of a Washington, D.C. building.

The Kirkland Monument remembers a selfless Civil War hero who braved the battlefield to give water to his dying enemies.

This war hero's old shop remembers the fine line between medicine and quackery during the Revolutionary War.

An overgrown garden stands as a grim marker of an unrealized dream.

Remnants of a storybook amusement park hidden behind a strip mall.

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

Once forgotten and built over, this historic Black cemetery now houses a poignant memorial.

One of the most influential presidents in U.S. history wanted only this plain, elegant monument as his lasting memorial.

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