Not much for Jethro Tull but Athens would be amazing whatever you were listening to?
To maximize it as a concert venue, the next night we caught another show, this time in stadium built to host the 1896 Olympics (a rebuild of a stadium in the same location couple thousand years ago.) Reportedly the only 100% marble stadium.
Had never heard of the group but the concert was being set up when we toured the stadium the day before.
Turns out Madrugada is pretty good- best description we could come up with for them is Pink Floyd meets Disturbed.