Adventuring Time 
Discover 17 of 23 biomes.
Biomes are the different types of environments explorable in Minecraft,
you will likely get this trophy without knowing or explore most of the
required biomes playing naturally, a list of these is below:
Frozen River
Ice Plains(90296315345015956 this seed will spawn you in an ice plain)
Cold Beach
Cold Taiga
Extreme Hills
Taiga
The End
Plains
Forest
Swampland
River
Mushroom Island
Mushroom Island Shore
Beach
Jungle
Jungle Edge
Nether
Desert
Ocean
create a new world and enter this in the seed box;
4031384495743822299
this contains all the biomes combinations to unlock the trophy, just
walk around with the map in your hands and it should unlock eventually,
took me 30 minutes or so to unlock the trophy.
mushroom isle on seed
90296315345015956
its on the isle right next to the ice one you start on