These aggressively sustainable art homes look like something out of 1970's science fiction.

The Grand Canyon of Texas.

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

The second largest waterfall by volume in the U.S., Willamette Falls is outdone only by Niagara in the amount of water that is pushed northward.

This spectacular track has run continuously since 1882.

A stealthy Apache hideaway that became the haunting site of a mass grave.

Bizarre lunar-like landscape with thousands of large stone "hoodoos."

Stay in a room with a view... of the bottom of the ocean.

Who needs fancy modern water slides when this giant North Carolina rock works just as well?

An homage to everyone's favorite prehistoric cartoon family.

A French chateau, failed utopian community, odd museum, and Stonehenge replica in rural Washington State.

The only diamond mine in the world where you can keep what you find.

Sister store to the Echo Park Time Travel Store.

A giant 400-acre preserve in North Florida for displaced wolves.

An eccentric inventor's castle home with its own indoor weather system.

Explore 10 acres of environmental sculptures.

An outdoor sculpture park of giant pink robots and post-apocalyptic Christmas scenes.

Sandstone rock formations that look like they belong on the cover of a progressive rock album.

Mysterious ancient boulder carved with petroglyphs in the mountains of Western North Carolina.

A modern mechanical planetary system, part of a 10,000 year clock.

The oldest surviving synagogue in New York City is now a soaring art space.

Visit this playground of waterfalls, caves and sinkholes.

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.