Yes, there's more in the subwy besides rats. There's ART!

Look fast or you'll miss it! The Masstransciscope .  Grab a Q or B train Manhattan-bound. Right side of car. Just after Dekalb stop,lookout the windows. This is what you will get...

Bill Brand’s trippy “Masstransciscope” was installed in 1980 in the now-abandoned Myrtle Ave station on the B and Q lines.