100 massive sculptures in the Hudson River Valley.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

Come for the speed, leave in love with the desert.

A sculpture for the sun and stars, created by Nancy Holt.

This former rail stop in Utah was abandoned, repopulated by some nostalgic friends, and now is home to a single DIY aviator who lives in a hangar.

A 90-foot-tall psychedelic "tree" on the side of the highway has baffled passersby for decades.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

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

Huge otherworldly domed rocks on the shore of a deadly lake.

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

A hand-built folk art installation covered with messages of God's love.

The ghostly remains of an accidental sea.

Version of the French Riviera destroyed by the sea.

Explore 10 acres of environmental sculptures.

An artist's vision for connectivity spans seven continents and 16 countries.

A music-filled, booze-soaked oasis in the desert.

In which a local geological marvel becomes a quaint roadside attraction.

One man has installed bathtubs into the Utah desert floor to harness the powers of a natural hot spring.

The headquarters of the Fraternitas Rosae Crucis, complete with Rosicrucian pyramids, all in the Pennsylvania woods.

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

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

This massive store is home to an eccentric collection of vintage, retro, and peculiar goods.

This knobby, drooping New Orleans oak is a favorite place both for climbing and for meeting giraffes.