This picture of Trishul was shot in a Lord Shiva temple, located in the jungles of Jhalana Leopard Safari in Jaipur. Usually, Trishul can be seen hanging above the dome of Shiva temple, as well as inside the sanctum along with Shivling.
This Trishul was inside the temple. The one-clicked outside the temple can be seen in this. The symbol |Trishul & Damru. You can find what Trishul denotes in this blog post.Trishul is synonymous with Lord Shiva. It denotes the destructive power of Shiva. Destruction of Ego & physical form and lead to spiritual world! Therefore, it denotes three world – Physical world, world of mind and spiritual world.