If you're looking for a place to visit that seems to blend perfectly, parts of Europe, the Caribbean, Africa and the Americas, look no further than Old San Juan. The people are incredibly engaging and warm, and the city, visually stunning. It seems to ooze it's rich history between each of the street's cobblestone blocks.
Explore the intimate streets and take in the amazing vistas from high atop the fortress walls of the centuries old Castillo de San Cristobal and del Morro. Think high Pacific coastline or possibly Madeira, with that wonderful azure hue of the surrounding sea that is, the Caribbean. There are a ton of amazing places to stay, dine and drink, and the city has a youthful vigor that felt contagious.
And, the fact that Puerto Rico is a U.S. territory wasn't overtly noticeable.. or even vaguely so, with perhaps the exception of the plentiful English that is spoken by nearly everyone. Take in the El Yunque rainforest, Luquillo beach and the food/vendor kiosks that border this beach area, all a short drive from San Juan.
Oh, and I'm going back.. that's for certain.