An actor's tribute to a former mentor.

Once the center of power for the region's various factories.

This residential door allows San Francisco muggles a glimpse at the wizarding world.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

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

With the touch of a button, you can read a randomly selected short story.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

The oldest dim sum restaurant in the United States is a nostalgic jewel.

Its buzzing collection honors vibrator history.

An essential stop before plundering, BYO Cutlass.

Longtime headquarters of controversial boys' club for the world's wealthiest and most powerful.

A historic hotel that made a cameo in Hitchcock's classic film has no intention of letting guests forget its fame.

San Francisco's oldest operating hotel, with a Victorian atmosphere and a "haunted" fourth floor.

This contorting sculpture is the tallest in San Francisco.

This giant head is all that remains of a once proud statue that survived an earthquake but not a fall off of a wagon.

Colin Stokes "got a bit carried away" and built a castle that looks like something out of Tolkien.

Less a museum than a bizarre fantasy world created by artists and engineers.

A celebration of the animation wizard's childhood home and antique railroad memorabilia collection.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

This large cave is a summer home to thousands of bats and has a rich history dating back to prehistoric times.

Live long and prosper in Tennessee.

The world's second largest single-dish radio telescope, once used to contact E.T.

A glimpse of a waterfall is reached by a steel catwalk along a slot canyon located in an Ouray city park.

Located in the world's highest-altitude Dark Sky Community, this observatory welcomes amateur and professional astronomers alike.