Crevasses often have vertical or near-vertical walls, which can then melt and create seracs, arches, and other ice formations. These walls sometimes expose layers that represent the glacier's stratigraphy. Crevasse size often depends upon the amount of liquid water present in the glacier. A crevasse may be as deep as 45 metres, as wide as 20 metres, and up to several hundred metres long.
When in outdoor public spaces where you are legally present, you have the right to capture any image that is in plain view (see note below about sound recording). That includes pictures and videos of federal buildings, transportation facilities (including airports), and police officers.
If I as a citizen recorded your phone calls with me, it is completely legal for me to do so. The question you are asking cannot be answered as laws vary state to state. In all states a person can record your call without consent but they can't do anything with it in some states. In my state only one person involved in the conversation needs to know and that can be the person recording the call. In other states all parties must be notified.