See all Things to do in Valkenburg Valkenburg for: Adventure, Food And Dining, Art And Culture, Nightlife, Spa, History, First Timers, Family, Romance, Shopping Gemeentegrot Gemeentegrot Valkenburg, Cauberg 4, 6301 Valkenburg, The Netherlands About Gemeentegrot (Municipal Cave), [8]. Which was also used as a bomb shelter during the World War II. Add to Wish List
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