These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

This "Plant Farm Museum" is home to the divinely inspired and visionary outsider artwork of Reverend Howard Finster.

2300-year-old Roman road connecting the empire.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

Elaborate drama imparts an appreciation for 19th century hardships.

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

When an ancient supervolcano erupted, some of Nebraska's prehistoric animals were forever preserved in ash.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

Mysterious glowing orbs float through the desert night.

This small museum contains fossils from an era when Kansas was underwater.

Self-built house and sculpture park where the creator can still be seen in a glass coffin.

Millions of dollars worth of sculpture decorate this Iowa city center.

A four story, football field-sized, nine-grotto creation made of shells, minerals, and rare stones.

A fitting attraction for the corn capital of the world.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

A roadside collection of over-sized iron creations that are a bit more macabre than most.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

Nonprofit art center that promotes outsider, intuitive, and self-taught art.

The sea once considered an ecological wasteland is now called "crown jewel of avian biodiversity" by scientists.

A pair of large white marble lions guard this stretch of the Mojave Desert, and it is utterly mysterious how they got there.