A friend of mine is going to Rio de Janeiro for a conference this fall and invited me to come along. Should I go? It's an expensive and long trip -- from Pennsylvania -- so I thought I'd see if any of you had been there and if you think it's worth seeing. Is it really exciting and beautiful? Also, is it safe? I've never traveled outside of Europe and North America/Carribean, so I'm a bit nervous. I don't want to go anywhere too dangerous. Opinions on Rio and Brazil??? Thanks!