Sinkholes Like Eldon Hole
Alum Pot
Sinkhole
5.80
Mediocre
Gaping Gill
Karst
7.59
Good
Lost John's Cave
Sinkhole
5.52
Mediocre
Rowten Pot
Sinkhole
5.34
Mediocre
Sell Gill Holes
Sinkhole
5.06
Mediocre
Derby Silk Mill
Watermill
9.15
Excellent
Jodrell Bank Observatory
Observatory
8.37
Great
Royal Observatory Greenwich
Observatory
8.19
Great
Masson Mill
Watermill
8.06
Great
Stainsby Mill
Watermill
7.58
Good
Caudwell's Mill
Watermill
7.45
Good
Manchester United (EPL)
Team Sport
7.36
Good
Haarlem Mill
Watermill
7.23
Good
Blue John Cavern
Karst
7.22
Good
Treak Cliff Cavern
Karst
7.13
Good
Peak Cavern
Karst
6.99
Fair
Speedwell Cavern
Karst
6.62
Fair
Durham Cathedral (Romanesque Section)
Gothic
6.56
Fair
Poole's Cavern
Karst
5.89
Mediocre
Lake Peigneur Sinkhole 1980
Sinkhole
8.69
Great
Guatemala City Sinkhole 2010
Sinkhole
8.60
Great
Darvaza Gas Crater (Door to Hell)
Sinkhole
8.56
Great
Blue Hole of Dahab
Sinkhole
8.42
Great
Sarisarinama Sinkhole – Humboldt Pit (Sima Humboldt)
Sinkhole
8.42
Great
