water gate
fortified gate, leading directly from a castle or town wall directly on to a quay, riverside or harbour
De Reek
medieval water gate in Maastricht, Netherlands
Green Gate
old watergate in Gdańsk, Poland; one of the city's most notable tourist attractions.
Bridge of the Holes
bridge in Tournai, Belgium
King's Gate
entrance to Suomenlinna fortress
Water Gate
City gate in Grudziądz