From this lake to the Mount Titlis is a distanc from about 60 km.
But here it looks so close.

The Titlis (3,238 m) is a mountain in the Urner Alps of Switzerland. It is located on the border between the cantons of Obwalden and Berne in Switzerland, overlooking Engelberg (Obwalden) and is famous as the site of the world's first revolving cable car. The cable car system connects Engelberg to the summit of Klein Titlis (3,028 m) through the three stages of Gerschnialp (1,262 m), Trübsee (1,796 m) and Stand (2,428 m).

The last part of cable car way leads above the glacier. In Klein Titlis, it is possible to visit a glacier cave.