Synonyms for «underground chambers»

Synonyms for individual words can be found below.

Over 2000 bodies found in the various underground chambers, most dead from starvation. (sciencedaily.com)
They awake to find themselves in a maze - like underground chamber complete with a set of beds and a bathroom. (contactmusic.com)
A cave is defined as a natural underground chamber. (marblearchcavesgeopark.com)
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