Rajasthan is a treasure land for delving deep into the country’s history. Among myriad of forts, the Lohagarh Fort is popular for its unique features. 
 

This remarkable fort was completed in 8 years. The reason it is famous is because it is invincible and inaccesible for attackers. It is also called the Iron Fort of India. 
 

The architecture is truly remarkable with its sturdy walls that cannot be destroyed with cannonballs. 
 

Deep moats were constructed around the walls that were filled with water to make the fort completely impenetrable. 
 

The surrounding walls of the Lohagarh Fort are so thick that when a cannonball is fired, it sinks into the wall, resulting in a cooling effect of its fired force. 
 

After multiple failed attempts, they eventually ceased their attacks. 
 

The invincibility of the fort lies in the fact that its walls are made of mud. The strong walls can withstand powerful forces.