This railway-turned-greenway provides a pedestrian link in downtown Detroit and celebrates urban artwork.

Detroit’s downtown castle is one of the oldest structures in the city.

World's largest Christmas store.

Strange physical sensations and optical contradictions keep visitors coming back for more.

A wacky two-story folk-art assemblage of carved and found objects, with lights, motion, and sound now in need of financial support.

Travelers leave tea kettles in a remote part of Death Valley as part of a mysterious, decades-old tradition.

A unique collection of old miners' cave homes carved in to the hillside cliffs near Death Valley.

One of the most extensive and well-preserved collections of dinosaur footprints in North America.

The second-largest giant sequoia in the world.

A carnivorous plant paradise in a serpentine bog.

Rare recess caves fill this unbelievably beautiful Ohio park.

Home to a forest of whimsical pygmy Coast live oak.

A performance hall at the American Jewish University moonlights as a sci-fi film location set.

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

Rippling sand dunes frozen in the Arizona rock.

Most-visited and most-photographed slot canyon in the American Southwest.

Ancient human, animal, and geometric figures drawn in the earth.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

A reproduction of earth's many biomes.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

An absolutely beautiful 200-foot stained glass installation traces the evolution of knowledge.

Red sandstone structures dominate this landscape, which has been inhabited for some 5,000 years.

An abandoned Victorian-era amusement park is rusting away amidst luxury houses.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.