On my way to Europe, I'll stay a few days in Munich and then proceed to Dublin.
However, on my way back home (Brazil), I'll have 7 hours to spare at the Frankfurt Airport.
Can I leave the airport on these 7 hours or that can't be done, since my ticket is only one (divided into three flights)?
And, since I'm here, what can be done in 4 hours in Frankfurt?
I'm already sparing 3 hours for transit between the city and airport, check in and boarding.