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

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.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

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

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

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

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

The dance of this huge clock is a magnificent and eerie commentary on good and evil in the history of humankind.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

Eighty million natural history specimens call this gargantuan museum home.

An unusual round church in London with a Templar past.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Hollywood's oldest hotel is the site of the first Academy Awards, the birthplace of Marilyn Monroe's career, and the home of Montgomery Clift's ghost.

The decor of this Hollywood movie palace just barely predated the opening of King Tut's tomb.

60 feet of towering steel balances gracefully.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

A three-story, three-dimensional hobo clown in a tutu welcomes CVS shoppers.

Pay your respects to a folk-punk legend.

This star-studded Old Hollywood restaurant is where fettuccine Alfredo made its United States debut.

The private clubhouse for the members of the Academy of Magical Arts.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

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