A psychedelic labyrinth on the San Francisco bay.

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

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

A trash dump made beautiful by nature's power.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

Acres of natural wonders left behind by a socialite-turned-gardener.

The ruins of the castle that chemicals built.

The home of one of California's most important horticulturalists wilts amidst a lovely park.

360-degree virtual reality chamber physically immerses scientists into their data.

A popular winter vacation destination for migrating monarch butterflies.

A ghost town revived by hippies and wanderers throws its own special brand of holiday parade.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Legends surround this jagged rock formation in the New Mexico desert.

This is one really big nut.

Hidden inside this Arizona fast food franchise is an in-depth exhibit on the famed WWII counterintelligence program.

In the middle of a desert subdivision, there is supposedly an impact crater site from Kcymaerxthaereal times.

This quirky hot springs town known to locals as "T or C" was named after a radio show.

A mysterious spirit totem at the edge of Navajo lands.

This historic national park is covered in the stunning ruins of red rock pueblos.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

The artist James Turrell is repurposing an extinct volcano crater as an observatory to experience the cosmos.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.