The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

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

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

This Maryland farm is known for its amazing corn mazes and its 30-foot junkbots.

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

The smallest covered bridge in Maryland.

D.C.'s first central library was born out of a chance encounter with the philanthropist whose name it bears.

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

On the Hudson resides one of the largest clocks in the world.

The oldest farmer's market in America is so ancient it was approved by the King of England.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

A local prank turned town icon.

This statue honors the author's groundbreaking family story.

A winding district gerrymandered into the shape of a mantis.

This advertisement for talcum powder was painted on the rock face and has since defied removal.

Once America's tallest structure, now a Baltimore landmark.

This one-room cabin where the young colonel slept during the French and Indian War.

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

A Civil War Museum with some notable medical antiques.

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

A priceless collection of the Nation's cryptologic history.

The land is home to swimming ponies and a legendary 18th-century treasure.

An astounding collection of medical specimens, including bits of President Lincoln.

Berkeley Hot Springs presents to you "the only outdoor monument to presidential bathing."