The Monastery of San Francisco, located in Lima’s Historic Center, is a striking 17th-century colonial complex renowned for its ornate architecture and eerie underground catacombs. Built in 1673, the Franciscan monastery features a mustard-yellow facade, a richly decorated church with Moorish-style ceilings, and a library housing thousands of ancient texts. Its catacombs, used as a cemetery until 1808, contain the remains of an estimated 25,000 people, offering a haunting glimpse into colonial burial practices. Open daily, it’s a key cultural and historical site in Peru’s capital.