halo orbits
To "park" a spacecraft halo orbits are used around L1 and L2.
This youtube shows nicely a halo orbit around Earth/Sun L2
China currently has a communications satellite in a halo orbit around the Earth/Moon L2 to allow contact with bases on the far side of the Moon from Earth.
America's proposed 'Lunar Gateway' is planed to be in a halo orbit around our Moon.