The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

Inside, visitors are treated to the rich history of sugar farming and its impact on Hawaiian society.

Climbing this abandoned railway leads to breathtaking vistas of O‘ahu.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

A beach made of semi-precious green sand on the Big Island of Hawai'i.

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

Skeletons, medical artifacts, and other obscure and precious treasures all displayed in a wooden pharmacist's cabinet.

A floating cat sanctuary on an Amsterdam canal.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

This small museum gives visitors a chance to soak up the history of the "sponge capital of the world."

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

This black shoreline is made up of exploded lava particles.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

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

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.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

This pub was 238 years old when it decided to revamp its image: It started serving Thai food.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

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