Chevron maintains one “Standard” brand station per state so it doesn’t lose the trademark.

These subterranean storage areas hold emergency water reserves.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

Recovered from the brink of extinction, at home in the Financial District.

A man-made island in scenic San Francisco Bay.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

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.

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

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

The South's nickname was supposedly born at a former bank in New Orleans' French Quarter.

The world-record holder for the longest bridge stretching continuously over water.

The greatest collection of New Orleans masking and processional traditions covering everything from Baby Dolls to Skull and Bone gangs.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

This historic Victorian hotel has a scandalous history of affairs and murder.

Iconic rock formations that allow for exploration during high or low tide.

Made from local Irish moss, this pie is served only in Prince Edward Island's potato museum.

This engineering marvel is the longest bridge in Canada and one of the longest spans in the world.

This excellent museum recreates the boom days of the herring rush in the "Atlantic Klondike."