The above images will show you a full coloured images of what the Hidden Air Village looks like and the next one will break up the various buildings into their functions and or residences.

 

Above is an image of the Raishin Mountain Range which surrounds it's highest mountain peak - named Mount Tenju. And at the top of Mount Tenju is where the Hidden Air Village is located. To reach the Kuunoki, you must walk through the entrance which is where the mouth of the river opening is, and then treak all the way up the mountain range's paths, before climbing Mount Tenju. So yeah, it's a damn long way. The other thing about the entire Raishin Mountain Range is that it can absorb and store chakra, so this unique ability gives a the Kuunoki village an added defensive mechanism as outside Shinobis cannot just use chakra to climb the mountain.

Above are images of the Kuunoki stadium, used specifically for the Hidden Air Special Chuunin Examination. As you can see, it's actually not a full stadium, but a half stadium built right into the wall of the mountain. In fact, the VIP area is actually constructed out of the walls of the mountain itself. This small stadium has the capacity to to hold up to only a 800 people in it's stands but that's more than enough for the inhabitants of the Kuunoki village as there are only a few hundred citizens living in the Hidden Air village in the current time lime. On the floor of the stadium, you will find that there are 2 different coloured gravel. One covers just a tight square area used for the dual fights, and the other covers the entire half circle of the stadium floor.