It is a symbol of love for the world or a king's grief over twenty years that it took to construct. One can see endless photographs or videos and read several blogs such as this on the internet, but what the first glance of Taj Mahal does to you when you finally enter the compound, is something that you will only feel once in your life.
“Did you ever build a castle in the Air? Here is one, brought down to earth and fixed for the wonder of ages.”- Bayard Taylor
The thing about the Taj Mahal is, that it is perfect. I mean it doesn't have a good side/bad side or a bad angle or similar things associated with other mortal structures. In it's first glimpse you realise that it indeed is what it claims to be, one of the wonders of the modern world.
The Taj Mahal also doubles up as a praying place for the local Muslims on Friday, as they attend Jumma. Imagine that, one of the wonders of the world as your regular praying place.
The pillars around the Taj Mahal slant away from the main structure very slightly, so that in case of a collapse they fall outwards, also, as I wrote before, it is perfect, no matter where you look at it from.
"How many kings has it seen rise and fall?"
As the legend has it, Mehtab Bagh was the site that Shah Jahan wished to make the Black Taj Mahal for himself, a tomb where he would finally rest.