The Bayers Lake Mystery Walls are a series of stone structures and walls of unknown origin and uncertain age in Halifax, Nova Scotia.
Wikipedia https://en.wikipedia.org/wiki/Bayer's_Lake_Mystery_Walls
Official Website https://www.halifaxtrails.ca/bayers-lake-mystery-walls/
Address B3S, Canada
Coordinates 44°38'34.75" N -63°39'36.733" E