The ruins of this Alaska gold mine form a gorgeous ghost town.

Four-story concrete hotel never opened to customers.

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

Originally a brothel during the Klondike Gold Rush, this bar once used dolls to denote when ladies were working.

This frozen tunnel in central Alaska is both an engineering feat and a valuable climate classroom.

Gorgeous cave resemble a winter wonderland.

The ghostly remains of what was once the world's richest copper mine.

Upside-down trees serve as natural flower pots in this hanging garden of Alaska.

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

Mind-blowing carvings and fantasy ice scenes grace the largest year-round ice environment in the world.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.

This whimsical stacked cabin looks like something out of a children's book.

The ruins of a town wiped out by the second-largest earthquake in recorded history.

While not recognized by Guinness, this chocolate waterfall is likely to be the world's largest.

A high school astronomy enthusiast designed this model of our solar system to be traversed on foot.

The only house built with a turret, crenellations, and a moat in Palmer, Alaska.

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

This Alaska library may be the only one in the country that allows you to check out pieces of taxidermy.

Siberian husky that delivered a life-saving antitoxin.

Internationally recognized group that works to protect the wolf and educate the public about its plight.

Colorful boxes placed over the dead are left to rot and crumble.