In the south of the North Frisian island Sylt on a sand dune stands the lighthouse Hörnum. Construction of the 34-meter high red and white banded tower began in 1907. The lighthouses Westerheversand and Pellworm are almost identical in construction. From 1914 to 1933, one room of the Hörnum lighthouse housed Germany's smallest school with two to five pupils. The lighthouse is open to visitors and can even be used as a place for weddings.