Santiago, Chile - met a girl from my hometown randomly on the street. Very westernized city. It's like NYC's latin love child. Being on central time made it such an easy adjustment. Practice up on your Spanish though!
San Pedro de Atacama AT THE DRYEST DESERT IN THE WORLD! Awesome little town seemingly in the middle of nowhere! Was told it was very dangerous at night, but that didn't stop us from cruising the streets late night!