This south Vieques beach might not sound like much, but it's one of travelers' favorite experiences in Puerto Rico. During the day, Mosquito Bay is nothing special as Caribbean beaches go.

If you have extra time, Spend the day (and night) in Old San Juan is worthwhile. U.S. News Insider Tip: Many visitors flock to Old San Juan for nightlife, but you'll find more locals in La Placita ...

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