Two thousand artifacts from around the world collected by one woman who loved to travel.

A striking memorial to the 21 lives lost in an explosion at the Washington Arsenal

A memorial to a shareholder activist feared by CEOs around the United States.

This taxidermy horse was a Civil War hero.

This grisly headstone doesn’t seem to be resting in peace.

The school tested mustard gas for the U.S. Army during World War I.

Originally dubbed "Retirement" by the Navy Commodore who built it in 1780, this beautiful mansion is now the centerpiece of a suburban community park.

Once a thriving business district, this former shopping area is now an urban ghost town in the heart of the city.

The 72-foot giant escaped confinement in a large patch of mulch only to be reburied in the sandy shores of the Potomac River.

After hundreds of years of settlement, this once-bustling fishing village sunk into the Chesapeake Bay.

The shelves in the back of this thrift store are devoted to saving, not selling, retro tech.

A hidden alley in urban Baltimore is a haven for graffiti artists.

The origins of a large, medieval castle are shrouded in mystery, but now it's a delightful garden.

According to a local legend, this bridge was constructed by an astrologer with the help of the devil.

This magical-looking island is notorious for the misfortunes suffered by its owners.

The Pentagon sits on a former island that was in Virginia at low tide and D.C. at high tide.

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

An extensive, if one-sided, history of U.S. law enforcement's war on drugs.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

A delightful museum entirely dedicated to the tiny homes of dolls.

This deceptively beautiful island was once home to a German concentration camp and known as "Death Island."

It's a mystery why these remains were found with no traces of their bodies in sight.

A fantastical bed and breakfast with magically unique rooms.

A mammoth pair of Civil War artillery guns abandoned out in the forest.