Texas tower
beacon
belvedere
bench mark
bleachers
bookmark
bridge
cairn
catstone
conning tower
gallery
gazebo
grandstand
landmark
lighthouse
lightship
lookout
loophole
mark
marker
menhir
milepost
milestone
monument
observation post
observatory
outlook
overlook
peanut gallery
peephole
platform
ringside
ringside seat
seamark
sighthole
top gallery
tower
watchtower
tower of pharos