The order is as follows: 1) upload to the site spherical panoramas from which you plan to create a virtual tour; 2) from the list of uploaded panoramas add each panorama to the virtual tour (Add to 3D tour link); 3) open the created virtual tour, edit the panorama order, select the main panorama, set transition points (tunnels).
The 13th century castle of the Teutonic Knights. The castle is a classic example of a medieval fortress. It is the biggest castle in Poland, the largest brick building in Europe, and the largest castle in the world by its surface area.