Seven Wonders of the Adirondacks Contest Extended

So far the response has been good, but I've decided to extend our Seven Wonders contest until February 1st to allow for some more entries.

Which human and natural constructed things/places inside the Adirondack Park's Blue Line are the most significant, must-see attractions, marvels of engineering, historically important, or have other significance that makes them one of the top seven?

I'll offer a spectacular - well, maybe not spectacular, but certainly interesting - Adirondack related gift to one lucky person who puts their choice or choices into the comments. Chosen at random - one entry per person (anonymous comments won't count for this one).

Remember - two lists - one for the human-made wonders, one for natural wonders.

Submit your entries over here.