One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

These four islands right offshore have waterfalls, colorful lights, fancy buildings, and a secret purpose.

An L.A. traffic island where the faces of locals have been carved into massive granite eggs.

This record-setting hydraulic dam in the Montana badlands was one of FDR's most ambitious public works.

A smoke stack so large, the Washington Monument could fit inside!

For thousands of years, Native American hunters drove buffalo straight off this cliff in Montana's Yellowstone Country.

The oldest badlands in North America, Makoshika State Park takes it name from the Lakota words for broken land.

Modeled after a famous church in Vienna, Austria—but in Helena, Montana.

A small Montana town commemorates the dog who waited at the train station every day for his owner to return.

After Havre burned down, the best place to build was under the ashes.

These giant metal horses graze on a hilltop near the Montana highway.

This beautiful ancient site is dotted with perforated sandstone pillars considered sacred by some Native American groups.

The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

An entire town preserved as a historic landmark.

With over 340,000 artifacts and counting, there is something for everyone, often called the "Smithsonian of the West."

The only road through the heart of Glacier National Park.

Mining caused an asbestos emergency in this small town.

New fungal and bacterial species call this deadly lake home.

The shortest river in America flows for just 201 feet.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

This iconic water tower and failed bandstand is open for panoramic views once a year.

The only arched bridge made of stone on the entire Mississippi River.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

Two stunning 17th-century libraries and a cabinet of curiosities.