The infamous Boston Mob ran rackets from an office here in the 1970s.

The tomb of Increase Mather and his son Cotton, influential colonial ministers obsessed with the occult.

Tragedy on Little Brewster Island memorialized.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

This rare symbol of Eastern philosophy in the West has been created over years of painstaking construction by the local community.

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

A tiny piece of the Moon is embedded in this stained glass masterpiece.

The privately owned cemetery that holds room for Washington's finest when they step down from life.

This psychedelic tourist trap is a leisurely descent into madness.

A super-sized promotional trick that is now a D.C. landmark.

An abandoned stretch of elevated road in the middle of the Brazilian jungle.

The United States Capitol's former columns still stand.

The angel of death appears to weep black tears at this grave marker.

Science fiction's grandfather has a fittingly marvelous tomb.

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

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

A Civil War fort in the middle of Washington, D.C. has been swallowed by a forest.

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

A haunting tribute to pioneering photographer Clover Adams.

There just so happens to be a court even higher than the U.S Supreme Court: a basketball court in the building itself.

Visit this church that's shaped like a giant glass pump either to cater to women or to reference a tragic local tale. Or both.

Home to items never before seen by the public.

Art deco landmark on the outskirts of Washington, D.C.

Parking garage where Bob Woodward met Watergate source "Deep Throat."