I arrived at the airport on the outskirts of Frankfurt Saturday morning. I took a train to the main train station in Frankfurt and checked into the nearby Manhattan Hotel (www.Manhattan-Hotel.com). I spent the rest of the day walking around the old part of town. The temperature was very hot and the humidity was high. I have experienced these temperatures and high humidity in the U.S., but was not prepared for this in Germany. The temperature seemed to be in the upper 30's (Centigrade).
From Frankfurt, I took the ICE (Inter City Express) to Köln and transferred to the Thalys train to Brussels. These are super fast trains and I was told we were traveling 300 km/hour! EurailPass paid part of the tickets for these express trains; there was a surcharge for both.