I arrived in Prague after 22 hours of flights, taking me from Orlando to Newark to Lisbon, then Lisbon to Brussels to Prague. So I was beat when I arrived around 9 pm in Prague, and just about immediately fell asleep.
In the morning I had a few hours to wander around the city. My hotel was on Wenceslas Square, near Old Town Square where a famous landmark is, the Astronomical Clock.
After walking around about 2 hours, I made my way back to the hotel to get ready to meet the group. I wish I had been able to spend a full day in Prague before the tour started since it is a scenic city with a few bridges and old buildings to see.