The Wadden Sea on Borkum's sheltered south side is accessible only at low tide, when the water retreats to reveal kilometres of mud flats, tidal channels, and sandbars. Walking out into the Watt — as Germans call it — reveals an ecosystem invisible from the shore: lugworms, cockles, shrimps, and the tracks of birds that have been feeding here for hours. The silence, the smell of the sea, and the vast flat horizon make it one of the more extraordinary walks available anywhere in northern Europe.
Never walk the mudflats alone or without checking tide tables. Tides here can move faster than a person walks, and sea fog can close in with little warning. The local tourist office and several operators in Borkum organize guided mudflat walks, which are the safest and most educational way to experience the Watt. Guides know the channels, the timing, and the wildlife, and the walks typically take two to three hours. Wear old clothes and be prepared to get muddy.