An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

Fuel your honky-tonking with this venue's unbeatable “Recession Special.”

Developed by focused shutterbugs, this museum exposes visitors to more than 6,000 different cameras.

A second generation sun-powered marvel lights up the night.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

An offbeat angle on the ocean viewed through an antiquated lens.

One of the first skyscrapers in Santa Monica, and a famous getaway for the Hollywood elite of then and now.

Along a coast that sees the annual migration of humpback whales, a geological formation that takes the shape of a whale’s tail.

Hundreds of iconic jazz records were made in this church-like space.

Home to an endangered salamander, a full moon celebration, and a large spring-fed outdoor swimming pool.

This failed condo development was reborn as a street art hub.

Continuing the tradition of the dime museum in style.

Locals dubbed it the "Owl Building" because of its bird-like appearance.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

A beautiful multicolored mound formed by the mineral deposits of the Orenda Spring.

A mysterious echo seems to defy the laws of acoustics.

This lovely little pond is named after the hundreds of soldiers' corpses that were rolled into the waters during the French-Indian War.

The lost town of Neversink, sunk by New York City.

This once sprawling resort now sits abandoned, filled with graffiti and vibrant colors from an era long passed.

This Central New York ghost town was once a prosperous railroad community.

The dairy farm in upstate New York where nearly half a million people gathered for three days of peace and music in 1969.

Oldest existing wire suspension bridge in the United States.

A fire station-turned-church-turned-museum dedicated to the work of seminal light artist Dan Flavin.