Mars look a bit ignored... What about a monastery in some spectacular location on the canyons of Valles Marineris, possibly carved inside the cliff?
Valles Marineris has many settlements -New Adelaide, Guestton, Grunthal, Syrinx, Nosuinus-, so civilization is close, but given its nature of a labyrinth of canyones and valleys, you can pick an isolated place very easily.
Valles Marineris has many settlements -New Adelaide, Guestton, Grunthal, Syrinx, Nosuinus-, so civilization is close, but given its nature of a labyrinth of canyones and valleys, you can pick an isolated place very easily.