For many travellers cloistered away in this quarantine, the only thing keeping them sane is the vicarious thrill of virtual tours. Digital tourism has stepped up to give them their fix of adventure, and this tour of California&rsquos Mammoth Lakes is one that&rsquos sure to get the adrenaline pumping. This year-round wonderland of adventure sports and activities is bursting with jaw-dropping vistas, lofty peaks, and deep valleys, all on a truly mammoth scale.
