Colin Stokes "got a bit carried away" and built a castle that looks like something out of Tolkien.

A dead saint, a deadly poison, and a mysterious holy ooze.

This little valley along Highway 1 is engulfed by thousands of lilies during the spring season.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

A striking sculpture built to honor the women of the Lakota and Dakota Nations.

The cliff and rock formations are made out of Sioux Quartzite.

A 16th-century horror show built in a lovely Italian garden.

The oldest arboretum on the Dalmatian coast doubles as the gardens of Kings Landing in "Game of Thrones."

These light, hollow rolls have been linked to Acadia National Park since the 1890s.

This architectural onion has an original 1930's Jerry O'Mahony dining car at its core.

Sculptures, jams, and the wild west collide at this folksy retreat.

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

At high tide this strange footbridge appears to have no purpose whatsoever.

A bizarre house filled with an astounding array of collections.

Home to an endangered salamander, a full moon celebration, and a large spring-fed outdoor swimming pool.

A clear blue swimming hole with hidden caves, still unexplored.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

This geothermal hot spring hides beneath a slowly growing mineral dome.

Mysterious 500-year-old tapestries depict a unicorn hunt.

New York City's smallest piece of private property.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

One of only two commuter aerial tramways in the United States.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Read a book next to a Midtown waterfall.