Euclides is a small lunar impact crater located near the eastern edge of Oceanus Procellarum, about 30 kilometers to the west of the Montes Riphaeus mountains.

The mare in the vicinity is devoid of significant craters, but to the west is an area of low rises.

This nebulous skirt of light-hued material makes this feature very prominent under a high Sun, and it is one of the brightest sites on the Moon.

Euclides D is a small lunar impact crater in the Mare Cognitum.

However, in 2002, after Eppinger's association with Nazi prison camps had been brought to the attention of the IAU's Working Group for Planetary System Nomenclature, the name was reverted to Euclides D.[2] By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Euclides.