A playground built by the kids that is a child's wonderland, and a helicopter parent's nightmare.

This dark, quiet forest on the outskirts of San Diego is dense with rumor and lore.

World's largest collection devoted to one fruit.

A popular tourist cave with a dark past.

An increasingly eccentric apartment building, topped with winged beasties.

Two rocks in a perpetual kiss and one of "the most romantic spot in America."

At this California chicken ranch, four bucks will get you 18 eggs and a chorus of dancing animatronic poultry.

The abandoned personal amusement park of the King of Pop.

The largest permanent Monopoly board makes one of the longest games even bigger.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

The tea room that pushed the boundaries of adorable straight into...we can't find the words.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

Visible below the waves are memorials to the city's Gold Rush dead.

Eons old volcanic activity created one of the most stunning rock formations in the United States.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

An essential stop before plundering, BYO Cutlass.

This charmingly homemade amusement park has been growing for 40 years.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

Canyon walls shrouded in ferns.

A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

Tiki luxury on Nob Hill.

San Francisco's newly reopened hands-on science museum.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.