More of Iapetus
The fascinating walnut, with its equatorial ridge.
Public Domain, Link
In this close up below the surface almost resembles dune sand, cratered dune sand, but dune sand nonetheless.
By NASA/JPL/Space Science Institute - [1], Public Domain, Link
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I always found that fascinating. There are quite a few fascinating moons out there. A death star of saturn, and a https://en.m.wikipedia.org/wiki/Phobos_monolith
Plus the moon you feature has another very striking, feature:
https://www.space.com/4444-mystery-saturn-faced-moon-solved.html
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incredible detail