Puerto RIco was settled the Spanish in the early 1500s. Those conquistadors converted the city of San Juan into a military outpost. Parts of the old city of San Juan still have the walls the conquistadors built!
Ahhh, this is to Florence what the Eiffel Tower is to Paris. You really need to see it in person to appreciate it. It just glows at sunset. When I stayed there I made a point of looking at it from a little hill where I was staying every night as the sun went down. Just didn't look real.
took a train into florence from venice. a great way to see italy. you can do overnight rides, sometimes they pair you up with a stranger....not the same bed but same compartment. honestly though everyone i've met that way is a solid human being.
The pantheon feels most special when you get to experience with few people around... There's no lines, but there are people here all the time so it's another one of the places that you might consider checking out early in the day...