This type of photos are made by merging several shots (in my case 17, it depends by your lenses' focal length), with the camera fixed on a tripod.
In order to get the merging right you need a panoramic head for your tripod, that allows the camera to rotate around the lenses' focal node.
Since they are pretty expensive I built one by myself for a total cost of 10€.
HERE SOME EXTRA PHOTOS