CultureThe Subterranean LakeTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoCulture07/28/2017July 28, 2017A good 100,000 visitors per year come to experience the mystical atmosphere of the St. Léonard subterranean lake in Switzerland. They can take an extraordinary boat trip deep beneath the Earth.https://p.dw.com/p/2hGkFAdvertisement