Cappella Molino is a 20th century public chapel which (according to the Diocese) is located at Via Ardeatina km 10 just south of the junction with the Grande Raccordo Anulare (Circonvallazione Meridionale). This is in the Castel di Leva zone.
There is a famous hostelry and pizzeria located here called Al Molino (at the windmill). According to the Commune, the Petetti family which runs it also provided a chapel. The Diocese lists this on its web-page for the parish of Santa Maria del Divino Amore a Castel di Leva.
The access is from Via Giovan Domenico Nardo, presumably number 9 which is the location of the Al Molino car park. The overall edifice is a very irregularly built collection of disparate architectural units, some of which belong to other businesses.
There is no information online as regards liturgical activities here, if any take place nowadays.
The Al Molino web-page is here.