Tags: Lighthouse, Tower.
Grundkallen is a Swedish lighthouse on a shallow of the same name in the southern part of the Gulf of Bothnia some 20 kilometres (12 miles) northeast of Öregrund. The current 34-metre (111.5 ft) lighthouse was built in 1961 to replace a lightship in the same location. It is a round concrete tower with a helipad on top and a round two-storey crew quarters in the bottom both painted red mounted on a round caisson which is painted black.