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

Four hundred granite steps were built into this massive rock by the National Park Service.

The home of the Dead Sea Scrolls is an abstract modernist dream.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

A massive, heart-shaped, wind-carved crater in the middle of the Israeli desert.

After over 100 years out of service this landmark windmill once again turns as a symbol of Jerusalem's self-sufficiency.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

3,200-square-foot mural inside Dartmouth Library depicts the history of America with images of human sacrifice, ancient gods, and other unspeakable terrors.

This nearly endless university hallway is home to a unique sunset known as "MIThenge."

"A hideous albatross in the Hudson River Valley."

During the 19th century, you could pay for violence off a prix fixe menu on this Manhattan street.

A bygone village occupation lives on via this quaint public chalkboard.

Mysterious 500-year-old tapestries depict a unicorn hunt.

San Francisco's newly reopened hands-on science museum.

A chilling disappearance (and rescue) of a child uncovers a geological mystery.

The most confusing clock in New York.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

The world's smallest drawbridge.

The final resting place for Bermuda's British military, including a man who died of sunstroke.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

The highest bridge in America was built for an almost unnervingly small amount of money.

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