Aqueduct

The Aqueduct is an unconstructable building in Age of Empires II HD: The Forgotten. Despite its appearance, units cannot walk through Aqueducts; they are essentially Walls. Aqueducts have no color, so no matter which player owns them, they always look the same. Aqueducts cannot be built, but are available in the Scenario Editor. Also, they make a few campaign appearances.