An imperial fortress city that incorporated cultural elements from the entire Mughal empire, only to be abandoned the year it was finished.

The Pennsylvania landscape depicted by a quarter mile of mosaics made from used road signs.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Pompeii's less famous neighbor is still revealing her secrets.

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

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.

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

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

It’s not hard to see why the historic Peabody Conservatory of Music’s library has been described as a “cathedral of books.”

This dramatic rail curve was once the target of a failed Nazi attack.

A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

There aren't too many operational funiculars around, but Pittsburgh has two!

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.

This beautiful, historic church looks like something out of a simpler past.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.

Yo, Adrian!

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

There are eight natural springs around town, each with a slightly different taste.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.