Does anyone have a suggestion on what to do when my overnight flight arrives in the early AM but my host will not be home until 8:30 PM? I have "carry on" luggage, so I was contemplating a solution would be to just ride around on one of those "hop on hop off" tour buses. My host suggested checking my luggage near Placa Catalunya. Will it be secure if I do that? I dread the whole day because I am usually worn out after a long plane trip.