Wheeeeeeeeeee! achievement in Minecraft Legends

I found the Mount Big Beak in the northwest section of the map, a little northeast of the Swamp Village

Big Beaks are brightly coloured birds that when you jump, you can hold down (or whatever button you have for jump) and you you will slowly float to the ground

In the same area where you find the Big Beaks, there are really tall snowy mountains, climb to the very top and you should see some Bouncecaps (red and white mushrooms that spring you high into the air when you jump)

Using your Big Beak, jump of a Bouncecap and hold and try and stay in the air for asking as you can, 30 seconds should be easy to do

*EDIT*

I didn't know the maps were randomly generated for each player, apologies