Where was Secret Ceremony filmed?

1968 film by Joseph Losey

Secret Ceremony (1968) was filmed in London, Katwijk, Noordwijk, Kensal Green Cemetery, Grand Hotel Huis ter Duin, Debenham House and 1 more place, 7 places named in its Wikipedia article, in the United Kingdom, the Netherlands. Wikidata records no filming location for it at all, so the article is the only recorded source. Each place says where its claim comes from.

See them on the map → Wikipedia Source data