Before you pick up the keys to your rental car and head off into the sunset, let us help you with a few basic details about Guaynabo.You’ll discover differences in culture and customs on your travels through Puerto Rico, Guaynabo is no exception.If you’re after some tips about what to do while you’re vacationing here, why not pull over your rental car and start a conversation with a few of the residents? With approximately 81,400 people living in this part of San Juan, you’re sure to meet a few locals willing to offer their suggestions.