giant's kettle
cavity or hole which appears to have been drilled in the surrounding rocks by eddying currents of water bearing stones, gravel and other detrital matter
en-GB/d͡ʒaɪənts ˈkɛtl/
en-US/d͡ʒaɪənts ˈkɛdəl/
cavity or hole which appears to have been drilled in the surrounding rocks by eddying currents of water bearing stones, gravel and other detrital matter