Where one line crosses over another. I know the lower track (though still well above street level) is the Union Pacific track that the Metra west line runs on. I'm pretty sure the top is a Soo line track.
I love this store. There were four guys sitting at a table back in the deli. They had their sandwiches and a bottle of mineral water and a bottle of wine. Then one of them got up and came back with little cups of espresso and some pastries to share. I was practically back in Rome.