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

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

This Taoist temple is the oldest continuously used Chinese temple in California.

Commonly referred to as the most photographed Victorian home in the United States.

Shakespeare has been brought to life in this open air theater for the better part of a century.

Humboldt's human-powered sculptures race across land and sea for days on end in a wacky quest for dominance.

A collection of colorful dinosaurs hidden in an actual rainforest.

This historic steamboat is scuttled just a few hundred feet from where it was built over a hundred years ago.

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

Treehouse motel and treehouse-building school.

Two mammoth statues inspired by equally tall tales lure tourists to this roadside attraction.

These cinderblock farmhouses were actually World War II radar stations in disguise.

This 19th-century museum inside of a lighthouse is only accessible during low tide.