Built in the aftermath of a devastating earthquake, this cathedral is one of the finest examples of Sicilian Baroque architecture.

The world's most active stratovolcano is almost always erupting.

Italian cave with exceptional acoustics and an unsavory history.

According to Greek mythology, this natural spring is the home of a freshwater nymph.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

This once-forgotten oasis in the middle of Lisbon was first created over a century ago quite by accident.

The Bristol Camera Obscura housed in an ancient windmill.

This hilltop park offers magnificent views and a Frank Lloyd Wright masterpiece.

Resting place of Hollywood's immortals is also site of summer film screenings.

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

Explore this massive series of 45 caves and over 51,000 sculptures carved from cliffsides in China.

A fifth-century temple improbably built into the side of a cliff.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

The bridge is a secret gallery of discarded gum that has been transformed into miniature masterpieces.

Scattered throughout London are ancient remnants of the city's former bounding wall.

This sprawling, Brutalist estate feels like a city within a city.

This hidden green space is the city's second largest conservatory.

A famous burial ground with a history both grim and literary.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

A historic arboretum and non-conformist, non-denominational park cemetery.

A display of everyday life in the area that was unveiled during the 2012 Summer Olympics.

Taxidermied animals galore, by appointment only.

This life-size monument honors the legacy of a famous literary feline.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.