Nature is a parkour map with 12 different levels and the theme is nature/decorativees
Everytime you complete a level, you get a block.
That block can then be placed in the hub.
Once you have collected, and placed, all of the blocks,
there will be a bonus level, leading to the end of the map - and you win.
This map has a level, that are only playable in 1.9, but
i have created it, so if you are in 1.8, you will not be teleported
to the level and you just get a purple wool block, and if you are in 1.9,
it will tp you to the level. Trust me - i have tested that, and it works.

Note: the .zip contains the folder, so when you have downloaded it pack out the folder an open it.
There is the folder that you should copy into your "game dir"

Thanks to www.minecraft.gamepedia.com for lots of things

If there is any errors or things that dont work let me know in the comments