Castillo San Felipe del Morro, also known as El Morro, is a historic 16th-century fortress in San Juan, Puerto Rico, offering stunning ocean views and a glimpse into the island's colonial past. The site is partially wheelchair accessible, with ramps available in some areas. Exploring independently is common, but guided tours provide deeper historical context. Expect to spend 2-3 hours to fully appreciate the site. There aren't significant seasonal restrictions, but it's best to visit during the cooler months (December-April) to avoid intense heat and humidity. Entrance fees are approximately $10 per adult, making it an affordable historical excursion. Be prepared for walking on uneven surfaces and bring sun protection.