Ecosystems in Valkenburg

Discover 1 places tagged “ecosystems” in Valkenburg.

View of Valkenburg from the ruins

Valkenburg, Netherlands

Kasteelruine Fluweelengrot

The ruins of this Dutch castle sit atop a labyrinth of once-secret tunnels and passageways, dating back over 900 years.

Are we missing something unusual in Valkenburg?