Oland lighthouse, Brick lighthouse in Schleswig-Holstein, Germany.

The Oland lighthouse is a 7.45-metre brick tower on a natural-stone base set on a reinforced-concrete slab, standing on the Oland warft in the North Frisian Wadden Sea. Its square walls are 23 cm thick and carry a hipped gable roof thatched with reed. The lantern, seven metres above mean high tide, holds a belt lens producing a fixed white, red and green light.

The lighthouse was built in 1929 and initially operated using liquified gas before switching to electricity in 1954. This transition to modern power sources happened as similar maritime structures across the region were modernized.

The tower stands on the Oland warft, the only mound on the Hallig of Oland. Its keeper, Jürgen Nommensen, followed his father and grandfather in the post, and the fault-reporting system is still housed in his home. The light shows white, red and green sectors: red to the north, green to the west, white toward Wyk on Föhr.

The tower stands on the Oland warft, the only mound on the Hallig of Oland, in the North Frisian Wadden Sea. It is reached by boat from Dagebüll or Wyk on Föhr; the crossing depends on the tide, so plan the visit around the boat times. The red sector points north and the green sector west, while the white light is seen from Wyk.

The keeper is Jürgen Nommensen, who followed his father and grandfather in the job; the fault-reporting system still runs through his house on the Hallig. The optic can be pulled out of the lantern casing on a slide for maintenance. The German article calls it the world's only thatched lighthouse.