The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

This replica stave church looks like a piece of Norway was simply plopped down in South Dakota.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

This museum celebrating the almighty dollar lets visitors literally stand in the shadow of a million bucks.

A gothic church spire sits atop this skyscraper, the tallest church in the world.

A castle built for love, and abandoned due to heartbreak.

A school teacher's massive and terrifying self-built castle.

Legend says that this short Canadian tunnel still holds the dying screams of a girl who burned alive.

The third version of this tall sailing ship sits, rusted and burnt, in Lake Ontario.

A well-preserved network of cavernous tunnels have spent silent centuries removing Toronto's waste.

One of Canada's most incredible rare book collections holds hundreds of thousands of gorgeous tomes that the general public can touch.

This chilly Canadian hotel has a four-month lifespan due to the unusual material it's made of.

This former prison now houses a lovely library devoted to Quebec's oft-maligned English-speaking history.

This sandstone gorge in New York State's Adirondack Mountains is home to waterfalls, flumes, and more.

Railways may have forged this quintet of lovely tunnels, but now they are open to hikers.

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

A sacred lake composed of over 300 separate pools of highly concentrated minerals.

The only road through the heart of Glacier National Park.

This angular Dwarven tunnel cuts through a mountainside in Glacier National Park.

Fossils, railroads, and waterfalls!

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