This morning the Mönch (german for monk) a 4110 meter (13,480 ft) mountain was missing, because he hid behind the clouds. Normally it forms together with the Eiger and the Jungfrau, a highly recognisable group of mountains, visible from far away (my balcony). Here you can find out, which one is missing: https://365project.org/mona65/365/2018-01-05