The Wadden Sea — Wattenmeer — is the shallow tidal zone between Langeoog and the mainland coast, and it is one of the most productive marine ecosystems in Europe. At low tide the flats are exposed, revealing cockles, lugworms, and the feeding grounds for millions of migrating birds making their way along the East Atlantic Flyway.
Guided Wadden walks (Wattwanderungen) from Langeoog take you out onto the exposed mudflats at low tide, typically in groups with a licensed guide. The mud grips your feet, the surface is dotted with lugworm casts and cockle shells, and the scale of the landscape — completely flat, with the island behind you and the distant mainland barely visible — is unlike anything inland. Bring clothes you don't mind getting muddy.