An overlooked memorial honoring the local Washington residents who died in World War I.

There’s a hidden military meme engraved on the World War II Memorial.

Part of a WWII submarine is lurking outside the Washington Navy Yard parking lot.

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

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

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

A Civil War Museum with some notable medical antiques.

A labor of love built by local hang-gliding enthusiasts, this ideal launch spot was outlawed by the authorities and has since been largely abandoned.

The smallest covered bridge in Maryland.

Washed out by the Johnstown Flood in 1889, the surviving portion of the original two-span bridge now resides at Fishing Creek.

First built around 1848, this bridge was destroyed by arson, but original timbers are included in the replacement.

This English-inspired Maryland garden is home to acres of opulent plant life including bushes shaped into an entire fox hunt.

Although built to generate electricity for Marylanders, this dam has become an all-you-can-eat buffet for American bald eagles.

This historic lighthouse was well known for the large number of women who served as its keeper.

An isolated island home to one of the oldest English-speaking communities in the region and Maryland's state dessert.

This building at the south end of the boardwalk was once home to the U.S. Life-Saving Service and the U.S. Coast Guard before being rescued itself.

The stone marker that Mason and Dixon placed at the eastern end of the famous north-south border they surveyed.

The rock on which Moll Dyer was found frozen to death is said to still bear her handprint.

An eerie, decaying ghost town destined to fade into the forest.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

A unique set of caves that spits waves back out into the ocean.

The air force base preserves its scars from the Japanese attack on Pearl Harbor.

This unusual lava tube spouts seawater during high surf.

This legendary urban waterfall creates a dazzling display of rainbows.