Deepest Sinkholes

The world's deepest sinkholes (including blue holes and dolines), which are dramatic geological depressions formed by the collapse of karst limestone…

• Dragon Hole (Sansha Yongle) — 301 (South China Sea)
• Dean's Blue Hole — 202 (Long Island, Bahamas)
• Hranice Abyss — 200 (Hranice, Czech Republic)
• Great Blue Hole — 124 (Belize)
• Dante's Hole (Xiaozhai Tiankeng) — 662 (Chongqing, China)
• Sima Humboldt — 314 (Bolívar, Venezuela)
• Crveno Jezero (Red Lake) — 281 (Imotski, Croatia)
• Pozzo del Merro — 392 (Rome, Italy)
• Blue Hole of Dahab — 120 (Red Sea, Egypt)
• Devil's Sinkhole — 122 (Texas, USA)

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