Telescopes are one thing, but there is an impressive amount of stuff out there in "plain sight" that is invisible because it is too far at the edge of the visible spectrum, or too dim.

I've been recently doing a project to photograph a lot of these massive interstellar objects in the perspective of landscapes to show how visually big they are. For example, here's a picture I took of the Rosette Nebula rising over Mt. Shasta. The nebula is visually bigger than a full moon, you just can't see it easily with the naked eye: https://www.instagram.com/p/CCO0CmnnVkA/