I actually updated my first adventure map that I started working on five years ago YET AGAIN. It is now optimized for Adventure Mode! Previously, it was made to run in Survival Mode.

Take your pick on where you want to download the map from:

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https://www.planetminecraft.com/project/an-amazing-journey/

http://www.minecraftforum.net/forums/mapping-and-modding-java-edition/maps/1524675-an-amazing-journey-adventure-edition-7-mazes

http://www.minecraftmaps.com/maze-maps/an-amazing-journey 

That last one will need a few days before it can update to the latest version...