The ISS. Woke up around 4-5 am just to see it a couple of years ago. I was afraid of missing it, but then saw a fast dot on the sky. First a dot, that split into 5 and a line, after that back to a small dot before disappearing.
Seeing the human technology in space with naked eyes is beautiful.
There was helpful site on Nasa to know when to look for it, but looks like theres an app for it now. Give it a try if you like space stuff, it cost nothing, well maybe a sleepy morning.
little history tidbit. Some of the first satelites for communications were actually just giant balls of aluminum foil. You could literally see them from space at night. They were like an itty bitty little moon almost.