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Puerto Rico
Vibe:Colorful, cultural, and wild. Hike a rainforest, dance in Old San Juan.
Why it’s hot: No passport needed (for U.S. travelers), solo adventure-friendly
Top spots: San Juan, El Yunque, Vieques
Budget (7–10 days): $1,800–$2,500
Solo-friendly tip: Stay in Old San Juan for walkability + safety