Sinkholes Like Morrison's Spring

Ginnie Springs

Sinkhole

6.90 Fair

Vortex Springs

Sinkhole

5.06 Mediocre

Little River Spring

Sinkhole

4.78 Poor

Ichetucknee Springs

Sinkhole

7.08 Good

Peacock Springs

Sinkhole

6.44 Fair

Troy Spring

Sinkhole

5.70 Mediocre

Madison Blue Spring

Sinkhole

5.43 Mediocre

Cenote Maravilla

Sinkhole

7.87 Good

Hranice Abyss

Sinkhole

7.41 Good

Jacob's Well

Sinkhole

7.18 Good

Pozzo del Merro

Sinkhole

7.04 Good

Lake Baikal

Landmark

9.70 Brilliant

Great Blue Hole

Karst

8.69 Great

Great Barrier Reef Marine Park

Biodiversity

8.64 Great

Sarisarinama Sinkhole – Humboldt Pit (Sima Humboldt)

Sinkhole

8.42 Great

Blue Hole of Dahab

Sinkhole

8.42 Great

Sarisarinama Sinkhole – Martel Pit (Sima Martel)

Sinkhole

8.33 Great

Red Lake (Crveno Jezero)

Sinkhole

8.19 Great

Boesmansgat (Bushman's Hole)

Sinkhole

8.02 Great

Fengshan Tiankeng

Sinkhole

7.96 Good

Blue Lake (Modro Jezero)

Sinkhole

7.91 Good

Miao Room (Miao Keng)

Sinkhole

7.75 Good

Cenote Saamal

Sinkhole

7.73 Good

Dry Tortugas National Park

National Park

7.63 Good