Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

Go inside to really appreciate this 500-year-old technological masterpiece.

Megachurch turned Catholic church comprised of 10,000 glass panes.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

2300-year-old Roman road connecting the empire.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

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

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

A marvel of Byzantine engineering under the streets of Istanbul.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

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

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

The glowing blue Nymphaeum of Emperor Tiberius.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

See massive fossils that are over 200 million years old in northeastern Arizona.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

Mysterious 500-year-old tapestries depict a unicorn hunt.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."