The only Bahá'í house of worship in North America and one of only a handful worldwide.

These aggressively sustainable art homes look like something out of 1970's science fiction.

When ecosystems collide in the arid Southwest.

A Swedenborgian glass church surrounded by redwoods sits perched atop a massive landslide area.

A whimsical village of unique treehouses resides in a Washington forest.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

A reproduction of earth's many biomes.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

This castle was once considered as an option for the Royal Family's alternate residence, but you may know it better from the 'X-Men' movie.

A small chapel celebrating the spiritual bond between dogs and humans.

Wee (and not so wee) footprints that insects and reptiles of the Paleozoic Era left behind.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

A Bhutanese temple gifted from the isolated Himalayan kingdom is now a surprising cultural gem located at the University of Texas at El Paso.

Natural catch-basin rocks covered in thousands of drawings spanning many millennia.

This art center is way beyond your average pumpkin-carving operation.

This open-air mosaic gallery honoring an English artist took hundreds of volunteers more than seven years to create.

An abandoned mine where dreams of quicksilver trickled away over 75 years ago.

Climbing this abandoned railway leads to breathtaking vistas of O‘ahu.