Nationalpark-Haus Wittbulten is the right first stop if Spiekeroog's beaches and mudflats are more than scenery to you. The centre explains the Wadden Sea ecosystem, island formation, tides, birds, seals, and the small creatures that make the flats so productive.
It is particularly useful before a guided mudflat walk, when names and patterns suddenly matter underfoot. The displays are family-friendly without being childish, and they make the national park feel less like an empty horizon and more like a living machine.