Have you ever observed something extraordinary and thought: "Wow ... wish I could be there and be able to take a picture that showed [x] or [y] or [z].

Some examples: the core of the sun just prior to a solar burst (impossible to get to - but what a pic that would make; inside the tail of a comet; near the center of the earth, where the magma is the hottest; on a snowflake in a raging storm (what a ride); etc.

Please add your own 'impossible to take photos' to this post.