One of many reminders of Tesla's scientific contributions overlooks the falls which inspired him.

A building so large that it has its own weather.

This former monument to an invented Iraqi victory was turned into a military camp during the subsequent invasion.

A swing to dangle you off the very edge.

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

This zombie-themed restaurant stands out in the heart of corn country.

The headquarters of the prestigious World Food Prize celebrates the heroes in the fight against hunger, has no cafeteria.

Millions of dollars worth of sculpture decorate this Iowa city center.

One of just a few cities in the world to base their center of government on an island. Others: Paris and Osaka.

The oldest university museum west of the Mississippi retains its 19th century feel.

A mysteriously dark cemetery monument fuels stories and legends galore.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

For just a few bucks, this Iowa funicular will let you feel like an 1800s fat cat.

Mother Nature outdoes herself with this stunningly beautiful set of caves carved into marble.

This elegant Colombian fortress was one of the torture headquarters for the Spanish Inquisition.

A dangling church built over a Colombian gorge.

A turquoise lake within a volcanic crater.