Exploring Valkenburg Netherlands castle and caves (4K) Valkenburg is one of the Netherlands’ most unique historic towns, featuring ancient caves, Roman tunnels, and the ruins of Valkenburg Castle.
When night falls, what was once the most secure castle in the Netherlands looms large, surrounded by black water. The water taxi from Woudrichem, a town nearby, chugs along, then departs. Now, all ...
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