lake mohawk i think

Actually it is Lake Hopatcong for sure located in northwest NJ

When visiting Roselle, New Jersey, I saw a plaque near the Roselle Park train station that says "First village lighted by electricity...". The actual invention may have occurred at or near his home in West Orange, New Jersey, but since he was called the Wizard of Menlo Park, maybe he had a lab there. (Today, Menlo Park is a section of the City of Edison.)

I think New Jersey does have a national park.

You can find Fundy National Park at the Bay of Fundy close to the village of Alma, New Brunswick. I am guessing that if Fundy National Park is NOT what you were thinking of, I think Lake Fundy is located in Canada.

lake mungo is in the far west of NSW, about 760 kilometres west of Sydney.