A spherical "micro-nation" in the heart of Vienna.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

Travel through the wholesome amusements of yesteryear at this charming miniature village.

At the time of its completion, it was the tallest dam in the world.

This town is home to the world’s largest arch constructed entirely of elk antlers.

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

The high point on the 16th president's eponymous roadway is marked by a massive version of his head.

A devilishly named gorge that was a sign of salvation for many pioneers.

The crumbling structure is a rare surviving relic of the area's bygone mining industry.

This Wyoming town is fascinated by a particular mythical creature.

One of the largest collections of wildlife art in the United States, built into the side of a cliff in rural Wyoming.

A monument to the egos of two railroad magnates that fell into decline along with their careers.

A popular rock that acted as a waymarker for American pioneers.

Long before guestbooks and hotels, frontier travelers signed their names on this rock face.

This rustic old building is said to be the most photographed barn in America.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

A miraculous natural phenomenon known as "the spring that breathes."

Devilish landscape, once cinema home to giant alien bugs, now derelict roadside attraction.

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

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.