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

This swanky speakeasy is Denver’s oldest bar—and hasn’t changed a bit since 1933.

A hidden gem, named after a San Franciscan icon, offers spectacular views of the Pacific Ocean.

This historic home has survived wars, drought, and financial woes to become a California landmark.

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

This crumbling warehouse was once the third-largest cannery in the U.S. and the first in the world to can green asparagus.

Named for a self-taught botanist who cataloged hundreds of native plants, this garden continues her work of preserving California plant life.

A 19th-century California philanthropist is entombed beneath the telescope he funded.

One time home to turn of the century explosives, now hidden under the Bay Bridge.

Deco Modern sculptures of the people of the Pacific, cast for the 1939 Golden Gate International Exposition.

A man-made island in scenic San Francisco Bay.

The memorial to the victims of the Jonestown Massacre carries the names of 918 lost, including one name people wish wasn't there.

The iconic Chicago sculpture hides a beautiful and easily overlooked plaque on the backside.

A shining sculpture made of 3,115 lights, the number of visible stars in the Northern Hemisphere.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.

A gothic church spire sits atop this skyscraper, the tallest church in the world.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

This historic hotel invented the chocolate brownie.

A Bibliophile's Dream.

Once called the "Polish Gold Coast" it is an icon of the neighborhood that bears its same name.

This surprising gem is a world-class archeological museum hidden at the University of Chicago.

This bronze sculpture on a former squash court marks the secret origins of the Atomic Age.

An actual 1957 Cadillac De Ville, encased in 15 cubic yards of concrete.

The original Garfield station is the oldest station facility on the "L", with the station house dating from 1892.