5 Underground Places That Reveal a Hidden World
What lies beneath a city or landscape can be as complex as the world above it. Natural caves record geological time, while mines, shelters, and underground settlements reveal how people adapted to danger and limited space.
These five places offer remarkable views below the surface.
Waitomo's glowworms create a living night sky
Thousands of glowworm larvae produce blue-green light inside parts of New Zealand's Waitomo cave system. Seen above dark water, the points of light resemble a dense field of stars.
Wieliczka Salt Mine contains chambers carved from salt
Generations of miners shaped passages, halls, sculptures, and chapels beneath southern Poland. Salt surfaces and underground lakes give the complex a character unlike a conventional stone interior.
Derinkuyu extends a settlement deep into volcanic rock
Derinkuyu is one of several underground complexes in Cappadocia. Rooms, shafts, storage areas, and narrow connections allowed communities to shelter below ground for extended periods.
The Paris Catacombs reorganized the city's dead
A portion of Paris's former quarry network holds arranged human remains transferred from overcrowded cemeteries. The public route is only a small section of the extensive tunnels beneath the city.
Seattle's underground passages preserve an earlier street level
After the Great Seattle Fire, streets in part of Pioneer Square were rebuilt at a higher level. Guided routes now enter surviving passages beside former ground-floor storefronts and reveal the older city below.
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