The residents at this Yellowstone wildlife park will certify your cooler as "bear-proof."

An eclectic assortment of medieval architecture in a small Iowa town.

This small museum gives visitors a chance to soak up the history of the "sponge capital of the world."

A towering monument in Spain has proven to be more labor-intensive than initially planned.

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

Originally used to sell brandy, the bull-shaped billboard became an iconic symbol of Spain.

Did Inca children also slide down these smooth rocky slopes above Cusco?

The labyrinthine home of the National Archives of Estonia is an experimental blend of architecture, art, and history.

This bullring in Lima is the oldest in the Americas and the second-oldest in the world.

It took 82 years and four different plaques to finally get the story right.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

2300-year-old Roman road connecting the empire.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

The oldest volcanology research center in the world.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

This historic recreationist school churns out warriors that may very well have had a fighting chance in Rome's pits of the day.

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

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

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

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

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

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

America's most famous piece of self-built architecture.

Buried beneath the New Mexico sands are believed to be millions of copies of Atari's E.T. video game.