San Cristóbal Fort is a historic fortress located in San Juan, Puerto Rico. Built in the 18th century, it was designed to protect the city from naval attacks and invasions. The fort is part of the San Juan National Historic Site and showcases impressive military architecture, including thick walls and strategic lookout points. The fort covers a large area and features various structures, such as barracks and a chapel. Visitors can explore its well-preserved grounds and enjoy panoramic views of the surrounding coastline. San Cristóbal Fort is a significant landmark that reflects the rich history of Spanish colonial rule in the Caribbean.