This will take few seconds to load. Once it loaded you could click "Start" to start the visit
When you enter the room, use your keyboard to move around in the scene.
To exit the scene, move the scene so the camera cursor(the blue circle) is over sign on the wall and click it.
To navigate to other scene, move the scene so the cursor is over a DOOR and click it.
Hit ESC key on your keyboard to release your mouse cursor.

clickable DOORs in the scene