The European green belt is an even starker example, it’s thousands of miles long but just a few tens to hundreds meters wide in most locations, yet its stability and continuity have made it a huge wildlife conservation area.
The experience is mixed, as while you can find amazing places like Słowiński Park Narodowy, where due to proximity to the lake and sea light pollution is low enough to behold the Milky Way, most of that section is interrupted by footpaths for beachgoers and really busy in season.