We came across Laacher See during our road trip through Germany. So we decided to rent a boat (for 12 euros) so we could float over this crater lake. And wow it was so insane yet so beautiful to float over an sleeping vulcano.
The caldera of Laacher See was formed after the Laacher volcano erupted, between 12,900 and 11,200 years ago. The Laacher is still considered to be an active volcano, proven by seismic activities and heavy thermal anomalies under the lake.