One of the most visited monuments in the world, it’s supposed to get higher number of visitors than the Eiffel Tower. It’s one of the places of worship for the Bahai religion, which is an open religion and accepts devotees from any walk of life. Beautiful building with an amazing sense of calm inside. I had the good luck to be there at the time of prayer. People are supposed to be quiet inside. No sermons or preaching or instruments are allowed. A lady sang a prayer and her voice filled the arches and reverberated bringing goose bumps.. It was some experience.