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culvert
vaulted cellar
bunker
mine shaft
sinkholes
einsatzgruppe
the wolf pit
casemate
burial chamber
burial mound
sett
microhabitat
the grave in the earth
feldkamp
schifferstadt
megalith facility harhoog
pillbox
charcoal kiln
hibernaculum
ditch side
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vaulted cellar
mine shaft
einsatzgruppe
bunker
feldkamp
hibernaculum
schifferstadt
mining site
ditch side
excavation site
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megalith facility harhoog
burial chamber
burial mound
bunker
blockhouse
dolmens
oil tank
mausoleum ruins
forest chapel
pillboxes
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limestone arch
natural arch
schliep
rotenfels
holloways
the limestone cave entrance
waldseemueller
hochwald
feldkamp
grannenkirsche
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dolmen
gożdzik stone
schwaben stone
tumulus
round hut
burial chamber
dobnik
temazcal
podobnik
feldkamp
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the water shed
burial chamber
bunker
vaulted cellar
charcoal kiln
oil tank
springhouse
ditch side
sluice gate
water well
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burial chamber
stone oven
temazcal
culvert
stone sink
schwaben stone
megalith facility harhoog
grotto
gożdzik stone
pillbox
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burial mound
forest chapel
mausoleum ruins
burial chamber
part of the ruins
megalith facility harhoog
springhouse
mining site
mine shaft
kisatchie
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rock outcrop
part of the ruins
outcropping
limestone cliff
outcrop
burial mound
mine shaft
megalith facility harhoog
rockshelter
rock cairn
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limestone cliff
the limestone cave entrance
limestone arch
rockshelter
outcroppings
rockcastle
outcrops
burial mound
breathitt
rock outcrop
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burial mound
waldseemueller
eorpwald
outcropping
the source of the danube
microhabitat
wolfschlugen
rock outcrop
limestone cliff
hochwald
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ditch side
downstream gate
streambank
streambeds
riparian zone
beaverdam
mining site
water channel
the brook
upper water
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vaulted cellar
mine shaft
the limestone cave entrance
pigeon spring
ditch side
hole in the wall
holloways
microhabitat
bear footprint
mining site
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microhabitat
habitat
fairy house
tree's nest
fallen tree stump
tree mushroom
kierszenbaum
bythewood
peckerwood
leccinum
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the limestone cave entrance
undergrounds
pigeon spring
cave on the water
mine shaft
vaulted cellar
temazcal
water spring
cave tour
crescent spring
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dolmens
schwaben stone
gożdzik stone
rock cairn
outcroppings
megalith facility harhoog
feldkamp
rock outcrop
burial mound
natural monument
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limestone cliff
rotenfels
rock outcrop
outcrops
outcrop
anticlinal
outcropping
greenschist
cliff face
schists
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burial mound
burial chamber
megalith facility harhoog
ditch side
blockhouse
mausoleum ruins
hubbardton
dcnr
bunker
part of the ruins
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bunker
downstream gate
sluice gate
ditch side
archery stand
megalith facility harhoog
burial chamber
mausoleum ruins
impoundment
emplacement
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mound
burial mound
ditch side
mound of dirt
burial mounds
limestone cliff
microhabitat
tumulus
outcropping
rock outcrop
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mausoleum ruins
part of the ruins
stone gate
megalith facility harhoog
jewish cemetery
forest chapel
burial chamber
schwaben stone
wukoki puebloan ruin
fortifications