The giant squid's 27-foot-long corpse lies preserved within a Sarasota aquarium.

FDR's Art Deco hospital tower was hopelessly inefficient.

This former asylum for Black Americans is haunted by its history of violence and racism.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

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

This sacred, circular cave is lined with pools so clear and still that it's hard to tell where the water begins.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

A quirky Poe-themed joint on an island keen to celebrate its overlooked connection to the famous writer.

The propeller from the first steamship launched on Lake Tanganyika.

The only National Monument ever to go missing for nearly 50 years then resurface in a dump.

Artifacts showcasing the witchy history of Zambia.

A gorgeous gem on the ocean.

Where hundreds of Japanese civilians committed suicide to avoid being captured by American soldiers during WWII.

The underground hideout of a Japanese soldier for whom World War II ended in 1972.

A winding district gerrymandered into the shape of a mantis.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

At 207 feet, one of the world's longest continuous escalators.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Scattered throughout London are ancient remnants of the city's former bounding wall.

The final resting place of soldiers' loyal canine companions.

A six-ton wedding present for the King of the Scots.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

A building so large that it has its own weather.