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

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

The spiral staircase hidden inside this giant Parisian column was likely built for Catherine de Medici's astrologer.

Two Ming Dynasty lion statues guard the entrance to the journalism school.

Destroyed by flood waters, prison now serves as a training ground for armed forces.

Like Stonehenge, but with boats and oodles more charm.

This majestic tree has survived 400 years of storms, droughts, and floods, and is a beloved natural landmark in Missouri.

Curious cave that stays a cool 56 degrees all year long.

The iconic remains of the original Academic Hall that burned down in 1892.

The maximum security facility was once thought to have "the bloodiest 47 acres in America."