Old Havana, a UNESCO World Heritage site, is a treasure trove of stunning architecture. Take advantage of the rainy afternoon to wander through the narrow streets and admire the colonial buildings, colorful facades, and charming plazas. Visit iconic landmarks like the Cathedral of Havana, the Plaza de Armas, and the Castillo de la Real Fuerza. You can also step into one of the many art galleries or boutique shops that line the streets. Exploring Old Havana's architecture will transport you back in time and allow you to appreciate the unique beauty of this historic city, even on a rainy day.