While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

The largest source of fossilized insects anywhere.

This iconic science fiction house still looks like something from the future.

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

Sniff the Titan Arum's rotting flesh.

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

The most confusing clock in New York.

Red frames showcase remnants of one of New York's original subway stations.

A crumbling hospital from the 1850s on Roosevelt Island.

One of only two commuter aerial tramways in the United States.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

The fairy tale castle of the "fairy-tale king."

Daily jousts and dancing barrel makers in Munich's mechanical clock.

A small but immensely extravagant palace built by the "Night King."

The prototype for all Nazi concentration camps.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

Home to more than 13,000 pieces of war memorabilia and military equipment.

Numerical symbolism abound at East Asia's oldest observatory.

Secret North Korean passage discovered below the world's most dangerous border.

This probably wasn't what Mao had in mind.

The most famous location in China was home to whole dynasties worth of imperial rulers.

A son-and-daughter meat market, hawked by mom and dad.