Formerly an island, Langness was eventually joined to the mainland by the movement and deposition of material along Castletown Bay to form a tombolo.

During periods of low visibility the only foghorn was a cow's horn which would be blown by a party of men on the shore – the sound of which carried for half a mile at best.

In 1832 a ship carrying Irish workers to the Isle of Man to dig potatoes was lost with all hands, and 32 bodies were washed ashore.

[2] Other structures to be found on the peninsula include the remains of a World War II-era gun training range, close to the lighthouse, and a memorial to local naturalist Henry Madoc, who was also the island's Chief Constable.

[2] The Castletown Golf & Country Club (formerly also a hotel, closed since 2007) is set on the peninsula and the isthmus connecting it with Derbyhaven and has been the scene of many international championships.