100 massive sculptures in the Hudson River Valley.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

Some 2,000 carvings show this rare desert spring has been an oasis for travelers for over a thousand years.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

A museum dedicated to the alleged Roswell Incident.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

A monument celebrating the idea of reaching inaccessible places.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

Once America's tallest structure, now a Baltimore landmark.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

An experimental, automotive replica of Stonehenge.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

An artsy hidden staircase leads to breathtaking views of San Francisco.

America's most famous piece of self-built architecture.

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

A small triangle of DC grass is the final resting place of one of Sonny and Cher's songs.

Version of the French Riviera destroyed by the sea.

An off-grid art installation that encourages its visitors to imagine a world without waste.

The ghostly remains of an accidental sea.

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

A former hardware store near Yerba Buena is the official home of California's history.