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

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

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

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

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

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

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

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

Elevated freight railway turned wildly successful urban park.

The pockmarks across the building's facade are remnants of the Blitz.

Legend says these colorful, invasive residents are the descendants of birds released by Jimi Hendrix.

A flourishing garden with pigs, donkeys, goats, rabbits, guinea pigs, chickens, ducks, and sheep.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

A museum wholly devoted to juvenescence.

Eighty million natural history specimens call this gargantuan museum home.

The painted and decorated towers of this Hindu shrine were once the tallest structures in one of the oldest cities in India.

The first English fort built in India.

This Gothic-style church is reputedly built atop the remains of one of Jesus's apostles.

The ancient tomb acts as a calendar that keeps perfect time.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

These gigantic skeletons tower over visitors and provide insight into the creatures that once ruled over Ireland.

The modern birthplace of Irish freedom.