Barely visible foundations remain where Stow Lake’s “observatory” once welcomed visitors.

Olfactory delights in San Francisco's Botanical Gardens.

The remains of a 12th-century chapter house in Golden Gate Park.

Golden Gate Park's historic collection of plants.

A garden oasis filled with flowers mentioned in the works of William Shakespeare.

The stones that traveled from Spain to eventually become a holy place for San Francisco's nature worshippers.

A favorite haunt of dinosaur loving children and hallucinogen loving hippies alike.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

A famous alternative culture epicenter and where Joplin serenaded young hippies.

San Francisco’s century-old Christmas Tree.

First Joe Pagac sculpture; sculpture reflects native Tucson wildlife in an urban setting.

Visitors to this public park will also find the ruins of an old western fort.

Opinions differ as to whether this Arizona tree was actually used as a Wild West jail, but that hasn't stopped the town from capitalizing on it.

This tucked-away cemetery is the final resting place of a prospector who uncovered one of the largest gold mines in Arizona.

The "Father of Arizona" tried to build a Zoroastrian fire temple on the hill where he's now buried.

Florence's historic adobe county courthouse was turned into a historic site that honors one of Arizona's most prominent political leaders.

A stone pillar marking the location of the westernmost battle of the American Civil War only honors one side of the conflict.

Where a staggering 747 ships were constructed during World War II.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

An enchanting tunnel of cypress trees leads to an old morse code station still used today.

This abandoned boat was left in place thanks to its rotting beauty.

This lighthouse has been guiding shipping into the Golden Gate since before the American Civil War.

Ride on a fully-restored Nike nuclear-tipped missile elevator from the Cold War.

An "anarchical" no man's land, complete with garbage sculptures and a hobo-run "Landfillian Library."