A museum befitting the city responsible for supplying the majority of the world's LSD.

A 140-year-old castle with underground caves hidden in San Francisco.

This eclectic collection documents the wild legacies of "America's Wickedest Street."

Neal Cassady may still have an open tab at one of Denver's oldest watering holes.

This 15-foot tall obelisk commemorating the Philadelphia-Baltimore railroad connection sat neglected for over a century.

America's smallest national park site is the former residence of exiled Polish national hero Thaddeus Kosciuszko.

One artist's love letter to his city and its citizens plays out across dozens of bright murals painted on the sides of decrepit buildings.

A psychedelic labyrinth on the San Francisco bay.

One of the oldest producers of hand-folded fortune cookies still uses its original secret recipe.

A huge musical instrument played by the ocean.