For travelers with a fear of heights, some of the world's most gorgeous spots are also the most terrifying. These nine hotels, from a cliff-side sanctuary to an uber-luxe mountaintop retreat, will test travelers who are even a little scared of heights. The views may be endless, but for some, so is the vertigo. Think you're ready to live on the edge? If so, proceed -- with caution. First up, the aptly named Rockhouse Hotel, which was built right into the rugged cliffs of Negril, Jamaica. Loungers can be found throughout the property at the cliff's edge, as high as 40 feet from the water below, and the massage hut (pictured) is set on a precarious-looking outcropping.