[@ViolentViolet]Well both ideas I have depend on winter. If the lake is small I was thinking that maybe in the middle of the lake there would be an old ferry (we could say scientists were studying plants native to that lake) that collided with some rocks and got stuck there. However if the lake is large there could be an abandoned research platform instead. The way to reach them would be when the lake froze on winter but there could be the remains of an old pier that starts in the grey thing on the map that marks the border and connects with the platform (We could use the tree if the lake is small). So those are my suggestions but it's up to you [@OtterTerror].

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[hider=Old Ferry][img]http://i.imgur.com/f4ueqZZ.jpg[/img][/hider]
[hider=Research platform][img]http://msusevastopol.net/wp-content/uploads/0.jpg[/img]
But not as high up. [/hider]
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[img]http://bridportwalkingtrack.com.au/wp-content/uploads/2012/12/Old-Pier1.jpg[/img]
[img]https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcR-vt0mlFNSSQL37inaXYFfCiY8Vq1l1Mn6F9kQ-y65CfZNIdYRXA[/img]
[/hider] 
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