Lange Jaap stands on the coastal strip near Huisduinen, a few hundred metres from Fort Kijkduin. The lighthouse is an elegant cast-iron column painted in alternating black and white bands, rising 63 metres above the flat dune landscape. It has guided shipping through the busy Marsdiep strait since 1877 and is still an active navigation aid.
The lighthouse is not regularly open to visitors, but it can be closely approached and photographed. The surrounding area — dunes, seawall, and the old village of Huisduinen — makes for a good short walk. On clear days the view from the dike takes in both the North Sea to the west and the Wadden Sea shipping lanes to the north.