Montanvert is a subsidiary height of 6303 feet situated to the north of Mont Blanc.
It rises above the Mer de Glace and by the later eighteenth century had become the
tourist perspective of choice on this natural phenomenon. The Shelleys visited the
Sea of Ice in a driving rain on 24 July 1816, then returned in better weather the
next day, leaving an account of their experiences in Letter 4 of A History of a Six
Weeks' Tour.