The Aventine Keyhole in Rome, Italy is a hidden gem worth uncovering. Located on a residential road above the Tiber River, visitors can explore the hillside and find the mysterious keyhole in the piazza dei Calvineri di Malta. Looking through it reveals a perfectly framed view of St Peter's Basilica and the Vatican City - an incredible sight! The journey to the keyhole is picturesque, with plenty of opportunities to take in the sights of Rome and get some epic photographs. After visiting the Aventine Keyhole, many people prefer to descend the hill and explore the Trastevere district for some authentic Italian restaurants. If there's anything this unique experience demonstrates, it's that Rome remains a fascinating and beautiful city, with plenty of secrets still waiting to be discovered.