Our spacecraft have taken us to visit and explore many stark and ancient landscapes in the solar system. At first glance, very little appears to have changed for billions of years, but if we look to the atmosphere we see a dynamism that belies active processes in the present era and that hints at changes at and below the surface. In this talk, we will proceed through these open doors to explore the movement of dust, ice and methane in the hauntingly familiar environment of Mars. We will then travel further to more exotic planetary destinations such as Pluto. Past results will be discussed along with future developments to explore the atmospheres of our solar system and beyond.