Castel Sant'Angelo, a towering cylindrical fortress in Rome, offers a journey through history, having served as a mausoleum, papal residence, and prison. Accessibility is generally good, with elevators available, but some areas may pose challenges for those with mobility issues. While solo exploration is possible, guided tours provide deeper insights into the castle's rich past and art collections. Seasonal restrictions are minimal, but expect larger crowds during peak tourist seasons (spring and fall). The entrance fee is approximately €17, and a typical visit lasts 2-3 hours, allowing time to explore the various levels, courtyards, and the rooftop terrace with panoramic city views. Consider purchasing tickets online in advance to avoid long queues.