You cannot tell which ones were made by the creators versus users really, it's just about knowing which maps come with the game, which are;
Bonfire Island
Lonely Cave
Cape of Distant Worlds
Temple of Dreams
Ficho Tunnel
Fluorite Plains
Ascension Island
South Pole
Atlantis
Last Cave
Skys Rim
Now, you start out in Lonely Cave, which is connected to South Pole, Ficho Tunnel, Cape of Distant Worlds, and Ascension Island.
From Ascension Island, you may enter Sky's Rim
From South Pole, you may enter Atlantis, then Last Cave
From Ficho Tunnel, you may enter Bonfire Island or Fluorite Plains.
From Fluorite Plains you may enter Temple of Dreams or Cape of Distant Worlds.
And that's basically it.
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As for hunting, no, those are just meshes the user downloaded and laid out to make it look as though it was hunted.
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Hope this clears things up a bit. c: