A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

Rainbow-hued local gem in Venice.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

A modern mechanical planetary system, part of a 10,000 year clock.

An outdoor sculpture park of giant pink robots and post-apocalyptic Christmas scenes.

Quite simply the largest tree in the world (by volume).

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

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Olfactory delights in San Francisco's Botanical Gardens.

Towering basalt columns, a creation of fire and ice.

A winding path built in secret on the edge of the continent.

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.

The legendary building that needed ghostly approval before being built.

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

A psychedelic labyrinth on the San Francisco bay.

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

A huge musical instrument played by the ocean.

A small village in two different countries.

Putting the "mod" in "modular" since 2000.

Both church and state get put to the torch in this annual festival in the "Bonfire Capital of the World."

This Welsh village gave itself a ridiculous name in a publicity stunt a century ahead of its time.

A open air theatre built on a cliff by an eccentric British woman.

A musical composition 1000 years in length plays at the Trinity Buoy Wharf in London.