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

This abandoned sea fort has become an accidental bird sanctuary.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

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

This dig site outside D.C. is known for its exceptionally high density of baby dinosaur fossils and dinosaur eggs.

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

Walk a trail through a historic Quaker town that outlawed slavery in 1777 and was a major waypoint on the Underground Railroad.

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.

A local farm's collection of unusual structures from a now defunct storybook amusement park.

A museum dedicated to exhibiting remarkable outsider art.

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

The site where Poe "in great distress, and ... in need of immediate assistance" likely died.

Fiji mermaids, mummified remains, and recreated cryptids are among the morbid oddities at this Maryland museum.

This free, take-a-book shop seems like a trick but isn't.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

The trials and tribulations of marking Poe's grave.

A giant wooden statue of one of the greatest pitchers in 19th-century baseball.

The monument marks where Simón Bolívar and his Spanish adversary Pablo Morillo met to have a drink together.

This unique depiction of the Virgin Mary may be the tallest kinetic art sculpture in the world.

One of the most iconic sculptures in Caracas looks like a large orange ball suspended in the air.

A pyramidal marker where the borders of Venezuela, Brazil, and Guyana meet on top of Mount Roraima.

The world's tallest slum.