A man stands profile view holding a mallet at the end of a dark cave like tunnel where there is a bright light.

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tunnel burrow excavator miner passageway passage cavern hollow cave caveman cavity cellar cove crypt den hole grotto lair opening earth rocks rock mallet tool instrument dark shadow outline profile shadows silhouette contour figure light end bright shape digger prospector digger dig collier dredger dredge coal work worker hammer malleate male man stone cobble boulder bedrock geology foundation soil solid foundation firm stratum sturdy hard dirt dust

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Size: 5175px × 3450px
Location: San Francisco CA
Photo credit: © Michael Soo / Alamy / Afripics
License: Licensed
Model Released: Yes

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