Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

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

Lie in a hammock where George Washington stood.

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

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

Copenhagen's celebrated theme park and gardens.

Time capsule of a museum, in which the Soviet Union remains alive and kicking.

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

Once the world's largest reinforced concrete structure, this abandoned bridge now beckons urban explorers.

A backdoor to Machu Picchu that only the most foolhardy infiltrator would attempt to breach.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

A granite monument honors a beloved World War II canine mascot.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

Corn-inthian columns with a uniquely American take on neoclassical architecture.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Perhaps the most scandalous statue of America's first president.

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.

Every hour the doors open to reenact the legend of the heroic mayor who saved his town by drinking a gallon of wine.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

One of the most influential presidents in U.S. history wanted only this plain, elegant monument as his lasting memorial.

The sculptor was instructed to add “stallion attributes” to the general's bronze mare.

A clock set into the concrete outside a Manhattan jeweler has been telling time underfoot for over a century.