chimney sweeper
abysm
abyss
arroyo
box canyon
breach
break
canyon
cavity
chap
chasm
check
chimney corner
chink
chute
cleft
cleuch
clough
col
coulee
couloir
country rock
crack
cranny
crevasse
crevice
cut
cwm
defile
dell
deposit
dike
ditch
donga
draw
excavation
fault
fender
fire screen
fireboard
fireguard
fireplace
fireside
fissure
flaw
flue
flue pipe
flume
fracture
fumarole
balcony
barn
brick
building
doorway
edifice
furnace
grate
hut
lamp
pillar
porch
roof
shutter
spire
staircase
stave
turret
warehouse