A face emerges from the landscape when seen from the air.

America's only nuclear missile silo open to the public.

A spiritual vortex among the red rocks in Sedona.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

See massive fossils that are over 200 million years old in northeastern Arizona.

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.

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

Elevated freight railway turned wildly successful urban park.

The site of the deadly Triangle Shirtwaist Factory Fire.

Unrepaired walls from a 1920 anarchist bomb attack.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Try not to get slimed in Tribeca.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

A beautiful geyser under environmental threat.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

Blackfoot petroglyphs of southern Alberta which date back as far as 7000 B.C.

The final resting place of 121 victims of the RMS Titanic, 42 of which may never be identified.

The seamy, underground secrets of Portland's criminal past.

The magic's in the hole!

A wall of chewing gum moonlights as collective art.

This notorious Canadian mental institution was home to some of the first LSD experiments and origin of the word "psychedelic."

Built after the 1991 discovery of one of the world's most complete T.rex skeletons in the nearby hills.

A surviving remnant of the thick ice mass that once mantled most of Western Canada's mountains.