Keyhole of the Order of Malta

Located on Rome's Aventine Hill on the gate of the Priory of the Knights of Malta, this famous green door features a tiny peephole offering an iconic optical perspective. Peering through the keyhole reveals an allée of trimmed garden hedges that perfectly frames the distant dome of St. Peter's Basilica. Media highlights it as a remarkable free viewpoint that uniquely lets visitors look across three sovereign territories in a single glance.

Commenters admire the spot as a magical, Secret Garden-style experience with an extraordinary optical illusion, sparking widespread wonder about seeing three countries at once. However, many note that it has become a victim of overtourism, drawing unexpectedly large crowds and lines. Others share practical frustrations, pointing out that capturing a clear photo through the small keyhole aperture can be quite challenging.