Banff National Park has no shortage of beautiful lakes (Lake Louise and Lake Minnewanka are standouts), but we opt for the aggressively blue Moraine Lake in the western part of the park. The lake owes its striking color to mineral-rich runoff from the surrounding glaciers, some of which you can spot on the Vally of the Ten Peaks—a row of ten mountains that once appeared on the Canadian $20 bill—in the distance. Visiting Moraine Lake also provides a handy excuse to book a stay at Moraine Lake Lodge, a cozy hotel with stone fireplaces and lake-facing balconies.