The Moon doesn't have canyons in the same way that Earth does. While there are some long, narrow depressions on the lunar surface, they aren't referred to as canyons.

Instead, these features are typically called "rilles" or "graben".

* Rilles: These are long, narrow, winding channels that are often thought to have been formed by volcanic activity or the collapse of underground lava tubes.

* Graben: These are long, narrow depressions that form when the lunar crust is pulled apart, resulting in a drop in elevation.

Some of the most prominent rilles on the Moon include:

* Rima Ariadaeus: One of the longest rilles on the Moon, extending over 400 kilometers.

* Rima Hadley: A prominent rille near the Apollo 15 landing site.

* Rima Hyginus: A rille with a distinctive horseshoe-shaped structure.

So, while we don't call them "canyons," there are definitely some impressive and interesting geological features on the Moon that resemble them!