Did you do any research? Metro San Juan has over 2 million residents. Think . Property is expensive along the coast so think Miami Beach . Old San Juan is 500 years old, so it's Old. The North Coast is the Atlantic with a constant trade wind. It's going to be rough. There are some sheltered beaches that are nice. It takes more than 15 minutes to drive through San Juan . That all being said, the run off had pretty much killed off the reefs around San Juan. You will need to take a tour off the island for any decent snorkeling..