橫瀾島是一個位於香港東南面的小島嶼，島上的燈塔於2000年12月29日宣布為法定古蹟。橫瀾燈塔於1893年開始投入服務，是香港現存五座戰前燈塔的其中一座。Waglan Island, topped by a lighthouse, is a very small island to be found on the southeast of Hong Kong. The lighthouse was declared as a monument on 29 December 2000. It commenced operation in 1893, is one of the five surviving pre-war lighthouses in Hong Kong.