Castillo de San Marcos National Monument

A must-see for history buffs and anyone visiting St. Augustine. Plan your visit early to avoid crowds and parking issues. The entrance fee is well worth the experience, but check for free entry with an America's Parks Pass. Arrive early to avoid crowds, especially school groups. Parking is limited, consider alternative options or hop-on hop-off tours. Bring sunblock, especially for children. Your ticket is valid for up to seven days, so keep your receipt.