A hugely popular road trip route has gotten too big for its own good, according to a list of the world's over-tourism hotspots. The Scotland North Coast 500 has only been running for nine years, yet the coastal loop has become a big hit. Each year huge numbers of bikers, caravanners, drivers, cyclists and much else besides take to the tarmac. What was originally set up and run by the North Highland Initiative, a non-profit set up by King Charles III, was acquired in 2018 by NC500 LTD, a private