there would also be stops at ayers rock in australia ; angkor wat and the killing fields and holocaust museum in phnom penh , cambodia ; the taj mahal and the amber fort of jaipur in india ; the rock cathedrals of lalibela , ethiopia ; the hypogeum and other ancient temples in malta ; and finally-weather permitting-a chance to see the northern lights in tromso , norway , a town located three hundred miles north of the arctic circle .