The shallow, salty inlet was a safe haven for 19th-century pirates.

Some of the ancient-looking huts among these strange rock formations aren't ancient at all, but built as part of a movie set.

A creepy, deserted mock Arabian village can be found in the middle of the Qatari desert.

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

Four-story concrete hotel never opened to customers.

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

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

This abandoned mine offers a glimpse at what life was like for those who came to Alaska seeking Gold Rush riches.

Considered by many to be one of the most dangerous highways in Alaska.

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

During the summer, surfers in Alaska take advantage of this inlet’s unusual water patterns.

Clean, cold drinking water flows from a nondescript pipe in a roadside rock face.

This WWII-era military installation once held an entire city within its walls - now, its walls are falling down.

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.

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

Open day and night, a church with three pews and Bibles.

One of Alaska's most significant ancient sites, spanning millennia and cultures, is right under the feet of some famously fat bears.

Buy your friend a drink or staple some cash to the wall for the next guy at the Salty Dawg Saloon.

A monument commemorating the role of Alaska's native Tlingit guides in the Klondike Gold Rush.

A tiny wilderness cemetery commemorates the deadliest episode of the Klondike Gold Rush.

The world’s largest concentrated solar plant generates as many problems as megawatts.

A striking, menacing sandstone peak towering above a landscape that's equal parts Mordor and the Moon.

At this gas station in the middle of the desert, a convenience store has been carved directly into the rock.