One of the world’s largest and deepest freshwater springs, where mastodons once roamed.

This large Sitka spruce that appears to be floating in mid-air, has defied logic for years.

A nude beach alongside a washed-out road.

This psychedelic tourist trap is a leisurely descent into madness.

Twelve plaster figures inspired by da Vinci's famed painting haunt the desert landscape above a real-life ghost town.

This once bustling boomtown hotel is now the hottest spot in Nevada for ghost hunters.

A raised boardwalk winds through a thicket of stunted, century-old trees no more than nine feet tall.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

Art from the latest counter-culture; kids who dye their hair blue and believe the future will be a post-apocalyptic water world.

The overgrown ruins of a once thriving World War I-era copper mine.

A series of waterfalls and pools that flow through the 'Ohe'o Gulch and into the ocean.

Thanks to a loophole in property ownership, this alleyway has become a cacophonous street gallery.

This natural marble cave is one of only five national monuments in Oregon.

A massive stairway that almost wasn't leads to one of Australia's most scenic vistas.

Eco-village hidden in the foothills of the Alps that created a massive system of psychedelic underground temples.

Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.

Mirrors and glass shards cover every inch of this arrestingly beautiful mosque.

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

Discover for yourself what Herb Caen referred to as "the best kept secret in the Bay Area."

Pensacola's UFO home has withstood many hurricanes—just as the experimental 1960s design intended.

Once an unstoppable source of gold and silver, this town came to a grinding stop when the groundwater proved deadly.

What's that on the side of that building? Va Va Voom, it's Bettie!

No one's quite sure why there's a metal megaphone bolted on two rocks in the middle of the Mojave Desert.

VW heaven in the backwoods of Dade City, now gone.