72 named features carry the IAU descriptor Vallis — a valley on Venus, out of 249 in the mapped Solar System.
The IAU assigns each feature class on each world a naming theme. Across the 72 valles with a recorded origin, 60 categories appear, led by Egypt.
Every one has its own page, on the surface it sits on.
The same descriptor is used on 4 other worlds, for 177 more features.