According to NASA, the International Space Station is the third brightest object in the sky (behind the Sun and Moon, of course.) This means under the right conditions, you can see the ISS with just your eyes.
When NASA started the Spot The Station! program, I signed up. Whenever the ISS will fly over where I tell NASA I am, they will send me an email detailing what day and time, for how long the station will be visible, and where to look.
Thus, I received the following email:
SpotTheStation! Time: Fri Nov 30 6:21 AM, Visible: 6 min, Max Height: 42 degrees, Appears: WNW, Disappears: SSE
I was a bit worried I wouldn’t be able to see the station because of light pollution, but that was not the case. She showed up on time, very visible, and moving fast! The station is like a really bright star or light on an aircraft high in the sky. If it weren’t moving so quickly, I would have thought it was either of those things. But there it was. Majestic. Amazing. Even more so when you consider there are three human beings inside that little dot.