BELGIUM: The Caves of Rosenburg Hill

In the little cluster of three hamlets that makes up the village of Zichen Zussen Bolder, they still tell an old story about a horseman who was galloping across the fields and suddenly disappeared into the earth, never to be seen again. Six years ago three village houses abruptly slid into the ground. Only last August, on the day of the village fair, the roof of the Catholic church collapsed.

None of these happenings was supernatural. The village and its fields stand on a thin crust of soft clay over a vast labyrinth of caves and tunnels some 30 miles...

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