Two small markers remember the Alamo's feline protectors.

A 131-year-old wunderkammer of Texas history.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

A ruined castle revived by a glove magnate, home to countless tales of bad luck, romance, and war.

A sharp bend in a dramatic river canyon cut through red rocks.

A tunnel with windows, so you don't miss out on the impressive views.

Most-visited and most-photographed slot canyon in the American Southwest.

This sculpture presents commentary on a life in pursuit of profits.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

Inside this library, the history of Los Angeles is retold through a mural.

This opulent hotel has been visited by Spider-Man, Charlie's Angels, and the Ghostbusters.

A Romanesque sanctuary of calm amid the bustle of downtown Los Angeles.

Though the original building has been demolished, these massive bronze doors were saved.

The legendary building that needed ghostly approval before being built.

Historic funicular railway, believed to be the shortest railroad in the world.

The space-age building is home to one of the few remaining rotating restaurants in America, and the only one that inspired a 1980s sitcom.

Famously misunderstood wonder of the ancient world

The oldest pub in Ireland may also be the oldest surviving bar in the entire world.

The ghostly remains of what was once the world's richest copper mine.

Considered by many to be one of the most dangerous highways in Alaska.

Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

A solitary tree has grown up all alone on Lake Wānaka, backdropped by the beautiful Southern Alps.