The World Heritage Day is observed every year on April 18 to celebrate and promote cultural heritage across the world. UNESCO defines a World Heritage Site as a natural or man-made area or a structure that is of international significance, and space which requires special protection.
In Ahmedabad, there are many pol preserved as heritage site in walled city. Some of these are more than four hundred years old. Those of Vaghan Pol and Shantinath Pol are the most fascinating as they are built under the ground.
Tourists visit the old architecture, study them and get pictures with them.