7 days exploring An Underground Citybr This salt mine is the coolest underground city I’ve ever seenbr Get Zaxbys MrBeast Box while you still can - Chicken Fingerz™, cheddar bites, fries, double Texas toast, signature sauces, a drink and my FEASTABLES BAR! Available only thru 1028 at Zaxbysbr # mrbeastbr #mrbeast vlogs br #mrbeastchallenges