The only road through the heart of Glacier National Park.

An Alaska livestock farm devotes itself to harvesting wool from creatures that once ran with mammoths and sabertooth tigers.

A trading post in the North Pole where children send letters.

A morbid gateway to an Alaska town prides itself on the hunting history it represents.

North America's first frozen mummified remains of an ice age steppe bison, the 36,000 year-old mummy named "Blue Babe."

The king of U.S. high points towers over every other peak on the continent.

The first botanical garden, a feather in the cap of the Grand Duke of Tuscany.

In the world's oldest university is a stunning 17th century anatomical theater carved from spruce.

This strange bovine gargoyle is said to have been put in as a passive aggressive form of revenge.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

Built to repay the sins of the father, this church is home to one of the most valuable works of Western art.

Italian poet Dante Alighieri is entombed in this small mausoleum in Ravenna, and his hometown of Florence has never been too happy about it.

The world's oldest surviving anatomical theater, where "the dead are pleased to help the living."

A stunning bridge that appears as if it's lunging to the shore, and has a legend of a devilish architect.

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

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

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

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

Ancient snack bar of the Roman Empire re-opened.

Secret refuge and museum of the Duke of Florence.

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

This picturesque Umbrian city has a subterranean side that has long remained hidden.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

A Nesting Doll of Churches.