A lawn full of retired spacecraft on display at one of NASA's first research labs.

Easter in Westminster may be the only time and place to behold Edgar Allen Poe made entirely of Marshmallow Peeps.

Built by the patriotic residents of Boonsboro in a single day.

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

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

An intricately designed junk art house with four extravagant junk art cars hidden in the suburbs.

A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.

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 museum dedicated to exhibiting remarkable outsider art.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

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.

Eighteen miniature death-scene dioramas.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

A collection of vintage liaison aircraft kept in flying condition and on display at an airfield in San Antonio.

This hidden sculpture garden full of Wild West art is one of San Antonio's best-kept secrets.

Amazingly detailed marble cinerary urns that once held the cremains of Roman elite.

A priceless work of art created by the saint's own blood sister hangs in a San Antonio basilica.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

The biggest drug trafficking passage between Mexico and the U.S.

This hollowed salt dome is the largest oil storage facility in the world, hoarding 250 million barrels of crude oil.

A colorful public mural in San Antonio's West Side encourages students to stay in school.

San Antonio's first 3-D stereoscopic mural is a trippy treat for the eyes.