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

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

The yawning maw of this pagan visage is said to bite off the hands of liars.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

Plaques on its facade commemorate the Tiber's most destructive deluges.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

This equestrian statue of Constantine the Great has been the subject of criticism for centuries.

Breathtaking and huge 430 year old maps of Italy.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

This emotive sculpture was originally created for the 1878 World's Fair.

The celebrated eyesore created by starry-eyed sweethearts.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

The history of radiation is on safe display at the foot of a radiation science laboratory.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

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

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

Modern technology and live displays tell the story of the Pacific during WWII for the Internet generation.

Abandoned railroad tunnel is home to a colony of three million Mexican free-tail bats.

A popular swimming hole that hides one of America's most deadly diving spots.

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.