A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

Limestone caves with spectacular showcase chambers.

The world's largest military aircraft cemetery.

Legend says train robbers stashed their gold within the depths of this unusual cave.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

The highest point in Arizona is an oddly snow-topped peak within the otherwise arid state.

Crafted in 1911, this steam locomotive spent its entire working life in Flagstaff.

A mining town, now abandoned, was built in a canyon so narrow that the railroad ran right through the hotel lobby.

This oddity shop contains everything from antique tools to a human skeleton.

After this former brothel closed, its interior remained almost frozen in time.

An abandoned 19th-century hospital now swirling in ghost stories.

This shrine to the patron saint of Alaska sits on a small tidal island and was built from the land’s own beach stones.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.

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

A whale of a public art display towers atop Juneau's cruise ship dock.

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

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.

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

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

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

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

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

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