The entrance only spawns if the bridge in the middle of the map of Ancient Valley - Frozen Tundra is NOT broken. This area is NOT accessible in multiplayer, even though the fence may spawn.
This is a reference to the MMO Maplestory where there is a hidden map called Pig Beach, with the exact same landscape and layout as Boar Beach.
-If you are being attacked and are hit while teleporting to Boar Beach, your current health remaining will be set as your maximum HP.
-When later in the game, traveling to boar beach while a boss type is spawning, the boss will continue spawning in boar beach for the first few seconds. I (the editor) have had two collosus spawn for a minute, and after that none.