Olympus Mons summit

Tallest volcano in the Solar System · on Mars, 18.65° N, 133.80° W

Nearly 22 km above the Martian datum, above most of the dust. The sky is darker and bluer here, and the volcano is so wide and gently sloped that from its summit it would look like a plain.

Stand at Olympus Mons summit in Stellingo: the ground is shaped from orbiter elevation maps and photos, the hardware is placed where it really is, and the sky above — the Sun, the Earth, the stars — is the real one, at any date you choose.