Nazi Underground Harbor (Watery Cavern)

Enormous subterranean cavern beneath the mountain fortress, housing a full-scale Nazi boat dock (also referred to as 'Nazi Cavern Boat Dock') crammed with motorboats, gunboats, and supply vessels. The cavern's dim waters reflect flickering lights off damp stone walls, creating an atmosphere of tension as engines rumble and waves lap against concrete piers. Indiana Jones and Henry Jones Sr. navigate the humid space amid Nazi soldiers swarming catwalks and piers in pursuit. The harbor serves as a chaotic launchpad for desperate escape attempts, with stacked crates and oily water adding to the industrial military atmosphere. The cavern connects to a secret room and is a key location in the Last Crusade episode.