Sperlonga: the walls of "Castello Invisibile". It's one of the most popular area of the spot, for its easy but nice routes, and the short approach. It's on the way to more demanding areas such as the Avancorpo di Destra and the Parete del Chiromante, so that often it's used by some climbers for warming up.

The topo of Sperlonga has been updated many times after the release of the first version, with the addition of many new areas and many new routes. Did you remember to update it? Open the page of the crag, tap on the top right "menu" button, and then tap on "Restore/Update". You might see more areas, or more routes...