Keitum is just beautiful . Thatched Frisian houses in the shade of old trees , romantic gardens surrounded by hydrangeas and Fries ramparts , exclusive boutiques , cozy tearooms and outstanding restaurants . The Wattloft is right in the middle and is an ideal starting point to experience the island . In St. Severin , Sylt oldest church, star-studded organ concerts are held regularly. The Watt offers clear air and space , offers relaxation and clears the mind .