Fort St. Andries is an former militairy fort between the Maas and the Waal near Heerewaarden. its also known as fort old St. Andries to avoid confusion between the newer young fort St. Andries thats located further west. It was built during het beleg van Zaltbommel in 1599 by Andreas, kardinaal of Oostenrijk. the new fortress was built in 1815, but it was blown up by the Germans in world war 2 and only the basement remains. the fort you can visit today is the new one, not the old one. Nowadays it's a populair hiking destination because you can walk over the dike and around the basement and in the watchtower to see the beautiful suroundings.
rossum has a lot of dikes, there is a beautiful walking route along the one by the waal. a nice route is starting from rossum and going to fort St. Andries and going over the ship lock St. Andries