A winding path built in secret on the edge of the continent.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

An artsy hidden staircase leads to breathtaking views of San Francisco.

Lucha Libre (Mexican Wrestling) themed taco shop.

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

The site of murders and Satanic cult gatherings.

A small sculpture garden that provides a microcosmic representation of California.

One of the only known surviving coconut palm trees in the entire state.

The classic Atari game's iconic aliens have invaded downtown San Diego.

Every weekend, people gather here for a brief chance to see their loved ones on the other side of the United States–Mexico border.

This futuristic bridge is one of the longest self-anchored pedestrian bridges in the world.

Not truly a ship nor a building, the Navy's first and last "landship" is now abandoned due to clerical issues.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

One of the few remaining carousels built by master amusement park carver Charles I.D. Looff.

An inconspicuous footbridge beloved by San Diego locals.

A 18th century graveyard and its astonishing cortege of macabre iconography.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

The heads of two giant mythological water horses honor Scotland's horselord past.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

360° views of the city plus five floors of optical illusions and hands-on science.