大海对城镇的侵蚀无可避免，而高高耸立的海滩堤坝会遮挡城市观海视野。Municipality of Katwijk, the Water Board of Rhineland当局请OKRA在沿海地带设了一个宽大的，轻微起伏的，自然沙丘般的海滩堤坝，保证了市民的看海视线和城镇的价值，同时也为城市提供了一个受欢迎的公共空间，此外，海滩堤坝下方还隐藏了车库。

自然沙丘般的海滩堤坝沿着海岸线蔓延，联系城镇与海滩，这里成为一个观赏海景的最佳地点，成为一个受欢迎的公共空间，成为莱茵兰城镇的活力中心。

Seaside Resort
For the past ten years the Rijkswaterstaat, theMinistry of Infrastructure and the Environment, have been working to strengthen some weak links in the coast. Alongside building the required coastal defence, the coast zone investments also ensure that Katwijk remains a tourist destination and supporting the local economy of seaside towns.With the need to strengthen the Katwijk coast, care is taken to preserve the value of the existing town and, ultimately, how this can also be made stronger.

Relation BetweenTownand Beach
In an interactive planning process OKRA defined the most important values of Katwijk; namely the relationship between the village and the beach. The chosen dyke-in-dune coastal defences, a stone-lined embankment covered and reinforced by dunes, sufficient low dunes would be built with minimal disruption between town and beach. With this construction the City Katwijkcould also realise an underground parking garage behind the dyke.

Natural Dune Landscape
The dyke and garage are completely hidden from view by natural-looking dunes. An extensive network of paths has been built to connect village and beach, offering views of the sea. The highlight of the design is a broad dune transition that serves as a welcome space and event plaza, in total forming a vibrant heart for the coast of Katwijk coast.

Client: Municipality of Katwijk, the Water Board of Rhineland

Duration: 2008-present
Implementation: 2013-2015
Area: 20 ha
Costs: 5 m ex buildingcosts,  6,3 m inclbuildingcosts

via：gooood.hk