Indiana’s largest prehistoric earthwork, aligned with the solstices.

Half-scale model of a historic ship in the children's section of Provincetown Public Library.

Everything you always wanted to know about borates is here.

San Franciscans leave gifts and messages for the magical beings that live behind the tiny, mysterious door installed on a tree in Golden Gate Park.

Odd stone and concrete monuments in the "Poet of the Sierras" eclectic folly garden.

Worker-owned cooperative and resource for those looking to lighten their ecological footprint.

The original place where water met land in the City by the Bay is outlined in brass.

Built in 1906, this unique building was the first Hindu temple in the United States.

A massive ultra-modern church presents a science-fiction view of Catholicism's inclusive future.

This (occupied) house is 10 feet wide and full of spite.

Twelve decommissioned shipping containers evoke a reclining person in Marfa, Texas.

The largest whiskey stash on the West Coast survived the 1906 fires--but not without heroic effort.

The oldest alley in San Francisco is paved with a reminder of the city's original shoreline.

These six walrus head statues harken back to a time when this area wasn't far from the oceanfront.

Part mural and part sculpture, this work of art sits in the middle of the Promenade, as if swimming in a river of asphalt towards the ocean.

27-room home built with the fortune of a sugar magnate.

When California condors were hovering on the brink of extinction, this recovery program was charged with helping the birds thrive again.

This teeny-tiny park built by a San Francisco man in 1962 is mostly stairs.

The unedited photograph called "Bliss" has graced the screens of over a billion computers.

Tony Blair's garden gnome and a Howitzer shell-turned-flower-pot are on display in this deconsecrated 13th-century church.

For roadside fast food, pull over at the giant orange.

Meet 'Big Josh,' the 20-foot-tall muffler man.

The oldest Naval cemetery on the West Coast.

The former Naval shipyard is open for exploring - mostly.