What appears to be an ancient Roman temple is actually a Catholic church.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

Drink wine handed out through a window as part of an age-old tradition.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

Underneath the historic center of Mexico City, the remains of a temple dedicated to the Aztec god of the wind.

These subterranean models show Mexico City's central square during three different eras.

Come face to face with the ferocious visage of the serpent-headed mother goddess of the Aztecs.

This museum houses two of Mexico's most impressive Aztec monoliths.

The only castle in North America to ever house European sovereigns.

Explore the atmospheric ruins of an abandoned convent in the dense forests of Mexico's first national park.

The famous artist couple lived and worked here, in two different houses separated by a bridge.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

A wooden hut from the Heroic Age of Antarctic Exploration.

Antarctica's bustling metropolis, originally established by Richard E. Byrd.

Naked scientists race around the pole in the frigid cold to try to join Antarctica's exclusive 300 Club.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

This handsome giant is said to mark the birthplace of the mythical woodsman and even had a cameo in a Stephen King novel.

The trials and tribulations of marking Poe's grave.

The childhood home of the Sultan of Swat is just a line drive away from Oriole Park at Camden Yards.

This English-inspired Maryland garden is home to acres of opulent plant life including bushes shaped into an entire fox hunt.

See four top-secret US spy aircraft of the Cold War era, including the legendary SR-71 Blackbird and the A-12 Oxcart.

A giant milk bottle from the 1930s beckons drivers to this diner.

One of the few brewers in the U.S. experimenting with hop-free beers.