without going through abraham. >> obeying god's call, abraham quickly left behind the trappings of city life and set off with his family on a journey toward the promised land of kanaan. >> it's a decision to leave everything that's familiar to you. i mean, it's letting go of everything and embracing the unknown. it's life-changing. >> here in southern turkey near herron, we met anna and david landis, an american couple raised christian, they're writing a guide book that will allow people of all faiths to follow the same path that abraham took. >> i think there's something always powerful about going to a place from the bible, from the stories you heard as a child. i think that makes the whole story feel more real. >> abraham took this journey 4,000 years ago, and now we're just dusting off his footsteps and inviting people to