A self-built castle made by a mysterious man.

An amazing collection of sculptures and art.

A gas station and a state sign commemorating the most famous claims of extraterrestrial abduction.

This maze-like slot canyon is a unique gem within an already fascinating geological area.

A small park on Bourbon Street features life-size bronze statues of New Orleans musicians.

The ruins of the castle that chemicals built.

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

Downieville's largest Gold Rush structure still standing has one of the longest bars in California.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

An outdoor sculpture park of giant pink robots and post-apocalyptic Christmas scenes.

A humble garage, world-famous for being the epicenter of a technology revolution.

With statues of Nelson Mandela and Harvey Milk this monument has been called the Mount Rushmore of California.

The Flatiron Building's storied West Coast cousin is a lot more into religion.

The newsstand that never closes its doors—well, almost never.

International delicatessen has been owned and operated by the same family for more than 110 years.

Dive bar built out of the remains of a whaling ship.

The miraculous hydrant that saved the Mission District in 1906.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

The ghostly remains of an accidental sea.

A 30-year-old Sycamore tree grown from a seed taken to the moon and back.

A volcanic landmark located on an Ice age lake bed.

This 19th century mansion façade adorned with immigrant patriotism is a symbol of Louisville’s history.