doline
geologically-formed topological depression
Danube Sinkhole
sinkholes seeping water from the Danube for about half the year, and transferring a part of them to the Aachtopf
blue hole
marine sinkhole or cavern
Bayou Corne sinkhole
collapsed underground salt dome cavern in Louisiana, USA
polje
large flat plain found in karstic geological regions
Cedar Sink
Sinkhole in Mammoth Cave National Park
The Inkpot
sinkhole located at the Salt Creek Wilderness Area north of Roswell, New Mexico
Petersham Hole
historic site in road, Petersham
Devils Well
sinkhole cave near Akers in the U.S. state of Missouri
Arendsee
lake in Germany
Sager Meer
lake in Germany
The Grotto
arch huge semi-circle
Puebla sinkhole
Sinkhole in Puebla, México
The Eagle (sinkhole)
sinkhole in Guangxi, China
Uvala
local toponym in some regions in Croatia, Bosnia and Herzegovina, Montenegro and Serbia for a closed karst depression
Seeburger See
lake in Seeburg, Lower Saxony, Germany
Cull-Peppers Dish
protected area in Dorset, England
cenote
natural pit, or sinkhole, resulting from the collapse of limestone bedrock that exposes groundwater underneath
Cenote Angelita
Well in Mexico
Fellner-Doline
cave in Germany
Lilla Cave
cave in Parasznya