 The Sicilian landslide in Eiser, France has been continuously monitored using tachyometry, radar, and extensometry devices since 1986. These instruments have enabled researchers to observe the landslide's progress and determine the amount of material that has fallen from the slope. Additionally, the lack of accessibility to the site has made it difficult to install traditional monitoring equipment such as seismometers or inclinometers. However, the use of terrestrial laser scanning, TLS, has allowed researchers to accurately measure the movement of the landslide and deduce the underlying cause of the movement. This method has provided valuable insight into the complexity of the landslide and how it interacts with the surrounding environment. This article was authored by Marion Jaud, Eric Morel, Johann Kaspersky, and others.