Spherical panoramic images are something I have been doing for many years. Coding by hand in the beginning, XML-driven flash, nowadays there is a plethora of programs to do this and it is strict HTML5. In addition, a drone if often used.
The principles remain the same however. Good stiching and meticulous camera positioning are the foundation of a successful result.
Below are three examples — and under them a listing of many more. As I have done them during so many years, the interface and the color might vary quite a bit. But I still think they are worth showing here. Please use the menu to access the images.