Saint-Martin-de-Belleville secured the top spot on Knight Frank's 2020 Ski Index, as it is one of only a few resorts to still offer development opportunities. Alamy Stock Photo
Saint-Martin-de-Belleville secured the top spot on Knight Frank's 2020 Ski Index, as it is one of only a few resorts to still offer development opportunities. Alamy Stock Photo

Europe's ski boltholes immune to Covid pandemic as prices in luxury resorts rise