Lake Ohara is a crown jewel of the Canadian Rocky Mountains.  The lake is at the bottom of a circle of basins created by hanging glaciers.  These have retreated leaving numerous valleys each holding their own lake, which in turn spill through a series of waterfalls down into Lake Ohara.  

There is a lodge at the end of the lake for those who wish to be deposited into a paradise, and experience alpine conditions up close.  There is also a back-country campground, and an Alpine Club of Canada Hut.  

The access to the area is limited very strictly by Parks Canada, so to get a spot in the lodge one must book up to a year ahead. For the campground, maybe three months, and for the ACC Hut, about six months.