bench mark
bookmark
boundary
cairn
cardinal point
catstone
chief thing
climax
core
cornerstone
crisis
critical
critical point
crucial
crux
essence
essential
essential matter
feature
fundamental
gist
gravamen
great point
guide
guidepost
heart
high point
historic
hoarstone
identification
important
important thing
issue
kernel
keystone
lighthouse
lightship
main point
main thing
major
mark
marker
material point
meat
meith
menhir
mere
merestone
place
position
landmarked
landmarking
landmarks
achievement
artifacts
attraction
building
clue
constellation
epoch
heritage
limitation
locality
memorial
milestone
monument
museum
obstacle
peculiarity
personage
precedent
scenery
shrine
significance
thoroughfare
trait