Life in this isolated, hilltop lighthouse was lonely, but it sure was lovely.

NASA's leading space science lab started by a co-founder with deep ties to the occult.

The former Naval shipyard is open for exploring - mostly.

Once strictly off-limits, this lower level housing curious and priceless vehicles of the Petersen Automotive Museum is now open to the public.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

A regular looking rock with an unbelievable history.

This massive redwood tree has a hole in the base big enough to drive through.

A world-class observatory in the California desert.

The final resting place of a space program monolith.

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.

A decommissioned Naval base now rents itself out for people who want to blow stuff up.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

The largest drain hole in the world.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

Abandoned bridge hidden deep in the San Gabriel Mountains.

Finale of "William Tell Overture" can be heard as drivers pass over grooves in the road.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

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

Towering basalt columns, a creation of fire and ice.

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

Little Red Lighthouse under the George Washington Bridge.

A crumbling staircase in upper Manhattan is all that remains of one of the most important sites in sports history.

In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

The former hotel where Tesla invented the radio.