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culvert
sinkholes
crevasse
soil erosion
water channel
fissure
crevice
the limestone cave entrance
runoff
crevasses
rock erosion
mudflow
fissures
crevassed
gullies
bear footprint
hole in the wall
ditch side
rockfalls
mud wall
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soil erosion
water channel
mudflow
crevasse
fissure
gullies
runoff
washouts
fissures
water hole
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the limestone cave entrance
mine shaft
the grave in the earth
sinkhole
empty tomb
hibernaculum
water hole
unexcavated
mining site
temazcal
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the limestone cave entrance
cave on the water
the blue caves
mine shaft
staffa
blue cave
pigeon spring
sea caves
blue caves
limestone arch
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road surface
soil erosion
mudflow
the ground
mud wall
ediacara
beach erosion
fissures
stone floor
tire track
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mine shaft
the limestone cave entrance
gruta
hibernacula
caving
vaulted cellar
el arco
mining site
cavern
caves
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mine shaft
the limestone cave entrance
hibernaculum
vaulted cellar
microhabitat
charcoal kiln
charcoal nest
spring nest
crevice
hibernacula
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hibernaculum
mudflow
snowbank
soil erosion
wood pile
karez
icesheet
glacial till
crevasse
igloolik
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the limestone cave entrance
speleology
karst area
spelunking
undergrounds
via ferrata
mine shaft
excavation site
water channel
excavated
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soil erosion
ditch side
landslips
steep bank
landslip
anticlinal
limestone cliff
hibernaculum
fossil dunes
mound of dirt
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bear footprint
smoking crater
hole
the grave in the earth
pot hole
holekamp
vaulted cellar
pothole
round hut
opercula
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water channel
ditch side
water spring
pigeon spring
anticlinal
washouts
mountain spring
levada
crescent spring
soil erosion
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vaulted cellar
the limestone cave entrance
tuff stone dwellings
burial chamber
cave church
empty tomb
stone oven
rockshelter
mine shaft
mountain cottontail at devils tower
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the limestone cave entrance
hibernacula
rockshelter
hibernaculum
limestone cliff
gruta
mine shaft
karst area
roccaforte
limestone arch
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mountain spring
limestone cliff
the limestone cave entrance
koli bacteria
limestone wall
pigeon spring
water spring
pegmatite
hydrogeological
microhabitat
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the limestone cave entrance
hibernaculum
microhabitat
karst area
ditch side
mine shaft
limestone cliff
burial mound
hibernacula
habitat
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the limestone cave entrance
fumarole
washouts
limestone cliff
white cliffs
rockfalls
rockslides
mountain spring
mining site
landslips
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soil erosion
foxholes
hibernaculum
bear footprint
animal grave
impoundments
the grave in the earth
crash site
excavation site
animal tracks
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rock needle
tollberg
tijeras
el arco
outcrops
crevice
outcroppings
bandelier
rock outcrop
outcrop
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the limestone cave entrance
mine shaft
sutjeska
hibernaculum
limestone arch
skuhravy
fissure
mining site
anticlinal
irisch cob
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the limestone cave entrance
cueva
rockshelter
karez
caves
temazcal
empty tomb
cave on the water
caving
karst area