A surviving remnant of the thick ice mass that once mantled most of Western Canada's mountains.

The frozen bubbles that form on the icy surface of this Canadian lake contain enough methane to create a small explosion.

A large spinning bath of liquid mercury, used to probe the early universe.

Not for the faint of heart, this long pedestrian bridge rewards those who brave the wobbly walk with a beautiful view.

With a floor made of thick glass, this observation deck offers a full view of Sunwapta Valley's mountains and rivers.

With its webbed walls and bright red coloring, Calgary's iconic bridge looks like a finger trap puzzle stretched across the river.

Fossils, railroads, and waterfalls!

Few other hotels can rival the grandeur of the Castle in the Rockies.

What was to be the world's most secure Cold War document vault ended up as just a few shallow caves.

This giant meditative chakra sits peacefully in the Flathead Valley of western Montana.

The only road through the heart of Glacier National Park.

A majestic hotel that also stands as a historic relic.

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

It was once used as a classroom to teach mining skills to local high school students.

An allegedly haunted mansion with a tragic, tawdry past.

An obscure waterfall that looks like something out of a fantasy novel.

The longest continuous lava tube in Oregon.

This semi-secret garden in south Seattle emulates a traditional Japanese garden using the plants of the Pacific Northwest.

This frequently-photographed waterfall takes only a short hike to visit.

An institution that preserves the history of institutionalization.

While it is not equipped to peer into outer space this observatory looks like it was built on the moon.

The second largest waterfall by volume in the U.S., Willamette Falls is outdone only by Niagara in the amount of water that is pushed northward.

A 1940s nuclear reactor built to produce plutonium for the Manhattan Project.

Nuclear reactor created the plutonium used on Nagasaki.