Point Roberts, Washington
Point Roberts is a pene-exclave of the US state of Washington on the southernmost tip of the Tsawwassen peninsula, south of Vancouver, British Columbia, Canada. The area, which had a population of 1,191 at the 2020 census, is reached from the rest of the United States by traveling 25 mi (40 km) through Canada, or without passing through Canada by boat or private airplane.
Source: Wikipedia — Point Roberts, Washington (CC BY-SA 4.0)