The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

At the United Kingdom's only residential library you can sleep among the books.

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

This tiny museum's sizable collection is jammed into a former underground public toilet.

One woman's Viking Castle on Lake Tahoe.

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

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

An essential stop before plundering, BYO Cutlass.

An encyclopedic collection of mammal penises.

Since 1973, this block has been home to the most concentrated collection of murals in San Francisco.

A military museum and library dedicated to the citizen soldier.