Jordan Pond is an oligotrophic tarn in Acadia National Park near the town of Bar Harbor, Maine. The pond covers 187 acres to a maximum depth of 150 feet with a shoreline of 3.6 miles. The pond was formed by the Wisconsin Ice Sheet during the last glacial period. It is one of the most iconic features of Acadia National Park and is a must-see location.
I recommend hiking the Jordan Pond Full Loop Trail to really take in all the beautiful views of the pond: https://www.alltrails.com/trail/us/maine/jordan-pond-full-loop-trail