The natural hot spring that was integral to the creation of Canada's first national park.

When it was built in 1929, this historic bridge was the only place to cross the Colorado River for 600 miles.

This stimulating sex toy museum is sure to arouse the interest of its visitors.

Part of a highway network meant to connect Miami to Montreal, this 10-mile stretch of road made from red bricks is still around 100 years later.

This unassuming riverbank is Missouri’s first designated site in the National Underground Railroad Network to Freedom.

US-50 in Nevada is known as "the Loneliest Road in America," but this earlier iteration of the route is even lonelier.

In 2018, Pohoiki Road was severed by lava flowing from the eruption of Kilauea.

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

In one of the hottest parts of the Mojave Desert, shallow bedrock forces the typically dry Mojave River to the surface in this canyon, providing a vital oasis for humans and wildlife.

Once luxurious, these oceanfront beach homes have been left to succumb to the elements as the beach is slowly washed away.

A spectacular but little-known slot canyon in extreme northern Nevada, with sheer walls nearly 500 feet high and a perennial stream.

Thousands of artifacts tell Mongolia's military history, from the Bronze Age to the present.

People have been scribbling on this massive chunk of granite for more than 1,500 years.

This "railway" for boats continues a waterway over a road.

An improbable waterfall springs from an orange-white cliff face, tumbling into the headwaters of the Virgin River above Zion National Park.

This now abandoned arch bridge was constructed during the Great Depression.

These otherworldly limestone formations jut out from the Kansas prairie.

This quaint museum lets you take a ride on its antique carousels.

Stories of sightless fish and ghostly cowboys are only a fraction of the legends surrounding this Kansas sinkhole.

A diverse, expansive nature preserve in northeastern Kansas.

These elevated trucks were put in place as a middle finger to The Man, but are now considered folk art.

This gravelly, dangerous highway is the only road in the United States that leads to the Arctic Ocean.

This popular fishing spot at the outflow of a 4.5-mile long hydroelectric tunnel sports a jetty literally made out of classic cars.

These structures were inspired by both Native American shelters as well as, strangely, an ice cream shop.