- Houlton is an unincorporated census-designated place located in St. Croix County, Wisconsin, United States. Houlton is located across the St. Croix River from Stillwater, Minnesota, in the town of St. Joseph. Houlton has no post office but has been assigned the ZIP code 54082. As of the 2010 census, its population was 386.
- Glacial erratic (Wikipedia)
A glacial erratic is a glacially deposited rock differing from the type of rock native to the area in which it rests. Erratics, which take their name from the Latin word errare (“to wander”), are carried by glacial ice, often over distances of hundreds of kilometres. Erratics can range in size from pebbles to large boulders such as Big Rock (16,500 tonnes or 18,200 short tons) in Alberta.