National Park boundaries disappear at < z13 for unclear reasons. It's entirely possible that someone using the map at z13+ may wish to see where the boundary lies.
Am I missing some justification for this?
The name labelling is also a little weird. There is a justification that one label in the centre of a 200km wide national park at z18 is not useful, but at the same time some indications of names (e.g. around the borders, see http://www.opencyclemap.org/?zoom=9&lat=45.45861&lon=-103.72349&layers=000B for state labels) at z12+ would be an improvement.
This has been solved, right?
Map example: http://www.openstreetmap.org/?mlat=50.5355&mlon=6.3221#map=12/50.5355/6.3221