Walk through the actual strap iron cells and solitary chambers of Arizona Territory’s first prison.

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

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

A trash dump made beautiful by nature's power.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

Megachurch turned Catholic church comprised of 10,000 glass panes.

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

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

Historic funicular railway, believed to be the shortest railroad in the world.

A nursery specializing in strange and beautiful succulents and cacti.

Bug-devouring flora are the stars of a special wing of the glass conservatory.

Contemporary art inspired by natural history and science drawing on ancient techniques in a modern world.

This impressive tunnel was dug entirely by hand over the course of 36 years.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

One of the most unusual geological features, recognizable from a dozen hit movies.

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