swap_horiz Jacob's Well Alternatives

1

Sarisarinama Sinkhole – Humboldt Pit (Sima Humboldt)

The Humboldt Sinkhole, or Sima Humboldt, is a substantial natural depression formed by erosion within Venezuela’s Sarisa...

Natural Large Venezuela Sandstone

9.2 Excellent

2

Sarisarinama Sinkhole – Martel Pit (Sima Martel)

Sima Martel, also known as the Martel Pit, is a substantial sandstone sinkhole located within the Sarisarinama Tepui in...

Natural Large Venezuela Sandstone

9.1 Excellent

3

Red Lake (Crveno Jezero)

Red Lake (Crveno Jezero) is a deep sinkhole in Croatia formed by karst processes. Its notable depth, exceeding 245 meter...

Natural Karst Croatia Deep

8.9 Great

4

Boesmansgat (Bushman's Hole)

Boesmansgat (Bushman's Hole) is a freshwater sinkhole in South Africa's Northern Cape, approximately 283 m deep, and the...

South Africa Freshwater Deep Flooded Cave

8.7 Great

5

Fengshan Tiankeng

Fengshan Tiankeng is a karst sinkhole in Fengshan County, Guangxi, China, part of the Leye-Fengshan UNESCO Global Geopar...

Natural China Tiankeng Guangxi

8.7 Great

6

Cenote Maravilla

Cenote Maravilla is a deep, partially collapsed sinkhole in Mexico's Yucatan state, notable for its spectacular sunbeams...

Natural Diving Mexico Quintana Roo

8.6 Great

7

Blue Lake (Modro Jezero)

Modro Jezero, or Blue Lake, is a karst sinkhole in Imotski, Croatia, known for its dramatically fluctuating water levels...

Natural Karst Seasonal Croatia

8.6 Great

8

Miao Room (Miao Keng)

Miao Room (Miao Keng) is one of China's largest tiankengs by volume, located in Chongqing municipality, with near-vertic...

Natural China Deep Tiankeng

8.4 Great

9

Cenote Saamal

Cenote Saamal is a large, open-air sinkhole situated within the Hacienda Selva Maya eco-park in Mexico, distinguished by...

Natural Mexico Yucatan Cave

8.4 Great

10

Hranice Abyss

Hranice Abyss is a flooded karst sinkhole in Moravia, Czech Republic, confirmed by robotic survey in 2016 to exceed 404...

Natural Diving Czech Republic Flooded Sinkhole

8.1 Great

11

Wink Sink No. 2

Wink Sink No. 2 opened in Texas in 2002, expanding to a diameter of over 250 feet due to groundwater dissolving the unde...

Texas 2002 Collapse Oil Field

7.9 Good

12

Pozzo del Merro

Pozzo del Merro is a flooded sinkhole northeast of Rome, Italy, surveyed to approximately 392 m deep, making it one of t...

Natural Italy Freshwater Deep

7.7 Good

13

Ichetucknee Springs

A group of springs in north-central Florida discharging over 230 million gallons of water daily into the Ichetucknee Riv...

Natural Florida State Park Spring Sinkhole

7.7 Good

14

Ginnie Springs

A cluster of seven springs in Gilchrist County, Florida, renowned as one of the premier cave-diving destinations in the...

Natural Florida Freshwater Cave Diving

7.5 Good

15

Peacock Springs

A Florida State Park in Columbia County containing the Peacock Springs cave system, one of the longest surveyed underwat...

Natural Florida State Park Cave Diving

7.0 Good

16

Troy Spring

A first-magnitude spring in Lafayette County, Florida, whose run contains the submerged hull of the steamboat Madison, d...

Natural Florida State Park Spring Sinkhole

6.2 Fair

17

Madison Blue Spring

A first-magnitude artesian spring in Madison County, Florida, connected to an extensive underwater cave system and prote...

Florida Freshwater State Park Cave Diving

5.9 Mediocre

18

Morrison's Spring

A limestone spring in Walton County, Florida, discharging into the Choctawhatchee River drainage and popular for swimmin...

Natural Florida Diving Freshwater

5.7 Mediocre

19

Vortex Springs

A commercial spring and dive facility in Holmes County, Florida, featuring an underwater cave system and one of the stat...

Natural Florida Freshwater Cave Diving

5.5 Mediocre

20

Little River Spring

A large spring in Columbia County, Florida, connected via underwater passage to the Peacock Springs system and noted for...

Natural Florida Freshwater Cave Diving

5.2 Mediocre