The crust is the coolest in temperature
Temperature wise, Uranus. Aesthetically, in my opinion, Earth, it has water.
The coolest layer is the crust. The crust is on the surface of the earth (where we are). The further you go down the hotter it gets, the inner core that is at the center of the earth is as hot as the surface of the sun!
The crust is by far the coolest.
.....A person can experience the coolest air temperature in a mountain, when he/she is on the left slope.......
This is a question with answers that can only be opinions, but the general consenus should be Earth, as we all live on it. Edit by Dan: No, he/she means coolest by temperature in which case it is Neptune which can drop to a freezing cold temperature of -200 Degrees Celsius to -250 Degrees Celsius.
Eureka
the mesoshpere
the outer layer of the Earth is the coolest layer and the core is the hottest at 5500 degrees Celsius.
The Tropics
Depending on ambient temperature and radiation exposure, exposed skin is usually the coolest
Uranus, with an average temperature of -355 degrees Fahrenheit and -215 degrees Celsius.