A Maryland museum dedicated to Black history, housed in a historic church.

The Decoy Capital of the World.

Electronic inventions that resulted in products and systems we use every day are on display in this labor-of-love museum.

Meet some of the most prominent figures in Black history through life-sized wax models.

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

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

A Civil War Museum with some notable medical antiques.

This simple convenience store sits on the location where the Ouija board was named—and has a plaque to prove it.

A model home in the Medical Examiner's Office in which grisly death scenes are staged to train forensic investigators.

The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

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

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

This ancient Hawaiian henge may have been an early star chart.

An ode to one of the first concerts broadcast via satellite.

This museum of Hawaiian and Polynesian culture is the legacy of the last descendant of the Kamehameha Dynasty.

Doris Duke's lasting collection of Islamic Art, hidden in a Hawaiian paradise.

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

What remains of the summer palace of King Kamehameha III.

Washington's top-secret Cold War-era doomsday communications tower is located in a small neighborhood park.

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

The whole world in one water tank.

A Civil War fort in the middle of Washington, D.C. has been swallowed by a forest.

A diminutive plaque recalls the treetop sniper who almost killed Abe Lincoln.

The final resting place of the tragic king and queen of the Jazz Age is tucked away in a small Maryland graveyard.