Roma.

Rome was such a strange experience, there were ruins everywhere we went. We would be walking and then boom ancient ruins, no biggie, just a couple thousand years old. We crammed everything into one big day, the Colosseum, the Arch of Constantine, the Trevi fountain, the Sistine Chapel, Rafael's frescos (including the School of Athens!!), Religious works by Marc Chagral and Dali, Vatican City, we even stopped into a small church to see a famous Caravaggio painting, and managed to squeeze in gelato of course. Belgium in 2 days!