Underground wonders to explore

The impressive Forestiere Underground Gardens, located in Fresno, California, were designed by Sicilian immigrant Baldassare Forestiere.

The Waitomo caves are a phenomenon unique to New Zealand: the walls and ceilings are covered in thousands of blue glowworms.

The Wieliczka Salt Mine was operational for nearly 700 years, dug out of the entrails of the earth by generation upon generation of miners.

The Batu Caves are home to dozens of Hindu temples whose entrance is guarded by an imposing gold statue of Lord Murugan.

The Paris Catacombs hold the largest ossuary in the world. Beginning in the late 18th century, the remains of millions of Parisians were transferred there from the city’s cemeteries.

Derinkuyu Underground City, Turkey
A church, a school, a stable, even a prison—these are some of the impressive facilities found inside the underground city of Derinkuyu, in Turkey. 

The Cave Suite, Arizona, USA
Check out the Cave Suite, an underground chamber inside an enormous cave close to the Grand Canyon in Arizona. 

Son Doong, the largest cave in the world, only opened to the public in 2013. The vast expanse could house a 40-floor skyscraper with room to spare.

The Eisriesenwelt Ice Cave, Austria
Nestled in the heart of the Tennen Mountains in Austria, the Eisriesenwelt is the largest ice cave in the world.

The Stockholm metro is a veritable underground art gallery. In fact, 90 of its 100 stations feature works by artists.

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