This legendary urban waterfall creates a dazzling display of rainbows.

Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

Hawai'i's oldest wooden house was shipped around Cape Horn from Boston in 1820.

A unique set of caves that spits waves back out into the ocean.

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

Hiding in plane sight.

This saltwater swimming pool, which is the last of its kind in the United States, is slowly crumbling within sight of multiple high-end beachside hotels.

On Waikīkī Beach, a monument to four extraordinary individuals of dual male and female spirits who brought the healing arts from Tahiti to Hawai'i.

The grand marquee of this abandoned Hawaiian theater remembers the building's elegant past.

An authentic replica of an Asian temple and garden hidden amongst the natural beauty of Hawai'i.

A Hawaiian stairway to heaven—that you can't climb.

Hidden behind a YMCA stands the remains of a ceremonial site that dates back hundreds of years, whose ground is still considered sacred to many Hawaiians.

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

This ancient Hawaiian henge may have been an early star chart.

Taste rums made with heirloom sugarcane on the distillery's own estate.

This coastal cavern is associated with the Hawaiian god of creation.

An eccentric German artist built this weird and wondrous castle packed with shocking sculptures and alien art.

A pre-Columbian ceremonial and astronomical site built by the Taino Indians.

This trio of Dominican cave lakes comprise a colorful biosphere of natural life.

Hundreds of pieces of ancient Taíno art cover the walls of this Caribbean cave system.

A single light illuminates one man's overshadowed contributions to street lamp history.

The oldest still-operating tavern in the United States was once owned by a pirate.

Unruly residents were housed in this one-person cell until the Black Maria arrived.

The only subterranean ping pong table in Atlanta.