. >> reporter: it is sunday, march 12th, day two of amber vanhecke's great american road trip.weh, that favorite term of hers for wanderlust, is in high gear. where did you go next? >> to the grand canyon, actually. >> reporter: the grand canyon is on most americans' bucket lists. and now, amber is fearlessly checking it off hers. >> and i assured my mom, she's okay. i have an undying, like, faith and trust in my sister that can take care of herself. because my sister's strong. >> it didn't occur to me about getting lost in the desert. because i have really decent navigation skills. >> reporter: along with those skills, she's also got a navigation app, the always reliable google maps to be precise. she types in the name of her next destination. the havasu falls trailhead, a remote spot in the grand canyon with aqua blue plunge pools so popular, it requires a reservation. that's the trailhead? >> yep. >> reporter: it's in the middle of nothing. >> yes. >> reporter: all right, let's go. it says 63 miles. and you only had 90 max on your tank. we returned with amber to this fateful