Witnessing the might of this dessert-colored desert waterfall is a rare, powerful treat.

Giant origami sculptures tucked into desert scenery beckon passers-by to explore further.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

An unoccupied lighthouse encased in layers of ice from the waters of Lake Erie.

Georges Seurat’s pointillist masterpiece has been recreated in Ohio in topiary form.

The flower-shaped temple in Virginia aims to transcend the boundaries of the world’s religions.

A modern ghost town whose inhabitants were driven away by the growth of nuclear power.

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

This concert pavilion on the shore of the Great Salt Lake has been destroyed by fire, water, and disinterest but keeps coming back.

This rare example of a "tidefall" is a spectacular drop from the cliffs down onto the beach.

A once grand hotel is being retaken by the wilderness it once capitalized on.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

This spectacular track has run continuously since 1882.

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

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

148 feet long and in the middle of a verdant forest.

Explore 10 acres of environmental sculptures.

One man's ambition created this psychedelic log home.

Most famous work of one of Frank Lloyd Wright's sons.

The eerie remnants of an ancient forest were hidden under the sand for centuries.

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

These beautiful ruins deep in the Pennsylvania woods are thought to have been a ski lodge or a speakeasy, but no one really knows.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.