Country Road is a puzzle type originally created by Nikoli.
Draw a single closed loop that passes through each room at most once. A number in a room indicates the number of cells visited by the loop in that room. If two adjacent cells are not visited by the loop, then they must be in the same room.
Note that the puzzles on this blog use a variant where not every room has to be entered.
See this sample puzzle and its only solution.
Jamie's Deceptive Puzzles 