For 14 years, this former stray dog greeted every train passenger that arrived in Fort Collins.

Built in 1981 in collaboration with Andy Warhol, this giant piece of pop art stands on the campus of Colorado State University.

A Colorado store that specializes in all things spiritual, metaphysical, and witchy.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

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

A New Zealand communications tower stands as the tallest structure in the Southern Hemisphere.

New Hampshire's first neighborhood is now preserved as a historic village with live action role players.

Generations of rockhounds got their start at this beloved, historic mine.

The design of the Palacio Salvo has been described as "a lighthouse on top of a building."

A massive underwater sinkhole made famous by Jacques Cousteau.

The fifth-longest natural arch in the world, and the longest outside China.

This geothermal hot spring hides beneath a slowly growing mineral dome.

Around half a million years ago, these magnificent columnar basalt cliffs were formed from cooling lava.

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

A beautiful geyser under environmental threat.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

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

Cryptid lake monster honored with its own monument.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

An underexplored, 130-foot tropical waterfall that you will have all to yourself.

There aren't too many operational funiculars around, but Pittsburgh has two!

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.