Haría, Spain
Los Jameos del Agua
Partially collapsed lava tube and cave system complete with concert hall, underground pond, and unique albino crabs.
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Places on this traveler's wishlist.
Haría, Spain
Partially collapsed lava tube and cave system complete with concert hall, underground pond, and unique albino crabs.
San Martín de la Virgen del Moncayo, Spain
The deserted remains of a luxury hotel turned hospital ward.
Ibiza, Spain
Inside a former smuggler's cave, an artificial waterfall and light show.
Memphis, Tennessee
Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.
Bulgaria
An abandoned sanatorium building from the early 20th century sits in the forest of the Rila mountains.
Sharonville, Ohio
A free park where visitors can learn about and collect 440 million-year-old fossils.
Crawfordsville, Indiana
The first spinning jail built in the United States is the only one that still turns.
Gallatin, Missouri
This octagonal rotary jail built in 1889 now serves as a visitor's center.
Želízy, Czechia
Human figures and faces are carved into the sandstone surrounding this cave in Czechia.
Ghajnsielem, Malta
This abandoned building, which is the second-largest structure on the Maltese island of Comino, has a complicated past.
Blacksburg, South Carolina
A royal relic from the time that gambling was accidentally made legal in South Carolina.
Cork, Ireland
This 19th-century prison once held Irish revolutionary Constance Markievicz, writer Frank O’Connor, and a nine-year-old pickpocket.
Arlington, Massachusetts
A tribute to Samuel Wilson, who may be the original "Uncle Sam."
Leeds, Utah
A mining camp built around an unexpected occurrence of silver.
Vegacervera, Spain
The spectacular geological formations make it one of the most impressive caves in Europe.
Muraglione, Italy
Ride a boat through this magnificent underground world, which now doubles as a theater.
Aracena, Spain
An underground spring in a labyrinthine cave system, decorated with stalagmites and stalactites.
Xagħra, Malta
In 1888, a resident of Xagħra, Malta, discovered a small underground chamber filled with stalactites and stalagmites when digging a well.
Xagħra, Malta
A small cave network was discovered under a home in Xagħra, in 1924 when the owner was digging a well.
Lisnagrave, Ireland
The eerie remains of one of Ireland's oldest castles, said to be haunted by the ghost of a woman who brings ill fate.
Crawford, Scotland
These crumbling ruins are all that's left of the ancestral home of Clan Crawford.
St. Louis, Missouri
The oldest soda fountain in St. Louis has been serving up treats for more than a century.
Shiraoi, Japan
Learn about the indigenous people of Japan's northernmost islands.
Portland, Oregon
The seamy, underground secrets of Portland's criminal past.