A fortress at the end of a bridge.
An opening in the wall of a fortress through which the guns are levelled; a narrow loophole through which arrows and other missiles may be shot.
A tower at the entrance to a castle or fortified town
A temporary wooden tower built for defensive purposes.
A structure supporting the junction between two spans of a bridge.
A similar structure, especially at a seaside resort, used to provide entertainment.
A rectangular pillar, or similar structure, that supports an arch, wall or roof, or the hinges of a gate.
A raised platform built from the shore out over water, supported on piles; used to secure, or provide access to shipping; a jetty.