The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.

Once home to the country's most gargantuan ships, this graving dock now waits for people to buy furniture.

Empty, but not abandoned, this cavernous Brooklyn loading dock was once considered the largest individual building in the world.

A unique sculpture park that specializes in the huge and bizarre.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

This museum boasts a bucket of teeth and tells the tale of a 20th-century dental circus.

This elaborate towering structure was once famed for its revolutionary height.

The first American department store, and home to the largest operating musical instrument in the world.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

World's first "penitentiary," meant to be humane, drove men insane.

Yo, Adrian!

A rare view of a preserved Victorian science museum.