Football field-sized microalgae production tanks on the Hawaiian coast create a stunning view from space.

More than 2,000 species of tropical plants call this nature preserve and sanctuary home.

This mom-and-pop Japanese sweets shop has been serving cloud-light mochi for almost a century.

The island of Lanai in Hawai'i is a paradise for cats and cat lovers.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

The house where a Danish physicist discovered the connection between electricity and magnetism.

The final resting place of one of the brightest physicists of the 20th century.

The final resting place of the author who gave us the Little Mermaid, the Ugly Duckling, and many more beloved fairy tales.

A novel collection of medical curiosities housed in an 18th-century surgeon training academy.

Museum on earth sciences featuring a recreation of a famous curiosity cabinet.

The gilded, masterful astronomical clock will calculate time, dates, and planetary positions for thousands of years to come.

This London plaque marks the spot where David Bowie's famous alien made his debut.

The final resting place to 300 Victorian-era pets hides inside the city park.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

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

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

A kaleidoscopic warehouse-maze of handmade neon signs.

The grand, column-fronted, sculpture-adorned home of the ambitious digital library.

A modern mechanical planetary system, part of a 10,000 year clock.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

An aptly-named street near the birthplace of the modern LGBT rights movement.

Hidden behind a gate in Greenwich Village is a little farmhouse that once served as the writing studio of a bestselling author.

New York City's only wildlife rehabilitation center treats more than 3,000 feathered and furry patients each year.

This castle-like building in Manhattan helped destigmatize cancer in the 19th century.