If you consider yourself a true master of parkour in Minecraft, then try passing the Insane Parkour map. Some levels here seem completely insurmountable, but still the map is well thought out and for each site you can find your own approach.
How to install Insane Parkour map
Download the archive.
Unzip its contents into the ‘saves’ folder located in the game folder.
Launch Minecraft, start a game, choosing the world [NAME].