* Low-altitude regions. Cosmic radiation is more intense at higher altitudes, so staying in low-altitude regions can reduce exposure. The lowest point on Mars is the Hellas Basin, which is located at about -7 km below the planet's average surface level.
* Areas near large bodies of water. Water is a good absorber of cosmic radiation, so staying near large bodies of water can provide some shielding. The largest body of water on Mars is the polar ice cap, which contains an estimated 1.6 million cubic kilometers of ice.
* Sheltered locations. Caves, tunnels, and other sheltered locations can provide protection from cosmic radiation. There are a number of potential cave systems on Mars, including the Valles Marineris canyon system and the Cerberus Fossae volcanic region.
It is important to note that even in these relatively safe areas, cosmic radiation levels can still be high. Therefore, it is important for astronauts to take precautions to minimize their exposure, such as wearing radiation-protective suits and spending limited amounts of time on the surface of Mars.
