A psychedelic labyrinth on the San Francisco bay.

The ruins of an ancient stadium that hosted gripping chariot and horse races.

This constitutionally sound Muffler Man harkens back to the days these attractions were a must-see.

A small car graveyard sits in the shadow of the famous Cadillac Ranch.

A sculpture made of 10 Cadillacs as a monument to the “Golden Age” of the American automobile.

This water tower slanted at an uncomfortable angle off the old Route 66 was an ingenious marketing ploy.

Nature's biggest mammal swims in landlocked Oklahoma.

A castle-inspired apartment building that has stood in Birmingham since 1927.

In 1911 this intersection was called "the heaviest corner in the South," an outlandish claim that only grew wilder over the years.

In Rickwood Caverns, visitors can travel hundreds of feet underground and see beautiful formations unique to the region.

The former home of the hard partying literary power couple is now one of the only museums devoted to their story.

This ancient market is often referred to as the oldest shopping mall in the world.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

Every last book in this bookstore is signed by the author.

One of Madrid's oldest trees, with a long and colorful history, resides in El Retiro Park.

The remains of the second-oldest zoo in Europe can be seen within these library gardens.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

Commonly acknowledged as the only public monument to the Devil himself.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Walk into an underground archeological dig, the site of the Roman Forum that was once the center of Valencia.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.