After Mainz, we drove the autobahn across Germany into the Czech Republic. Conveniently, the Pilsner Urquell brewery was right on the way to Prague so we had to stop for dinner and a few pints. In Prague, we rented a cute little apartment near the center of the old town and had a great few days wandering the streets of the city, finding ice cream and balloons wherever we could, visiting lots of parks including one with a cool miniature train, and spending a day at the Prague Castle where the girls pretended they were princesses.