Important Warning: The following was written in three minutes and may contain offensive themes.

Once upon a time, there was a group of magical rainbow unicorns.
Now, during the last four thousand years, they had been struggling against the Tookalookalas. The Tookalookalas would raid their stables and steal their magical turtles of joy. Now, the Head Unicorn decided to construct a sand castle to calm himself from the hearbreak of his people's helplessness. When he finished, it was the largest castle he had ever seen. So large, that it matched with his limitless imagination. He went and assembled the other Rainbow Unicorns to combine their magical powers to cause the sand castle to become a real one.

IT WORKED, and they moved in. When the Tookalookalas attacked, the castle stood no chance and it collapsed. The remaining unicorns were either left for dead or enslaved. The ones left for dead decided to rebuild the castle by hiring a bunch of low wage Mexican immigrants to reconstruct the structure.

Within months, due to Union labor laws and all their "breaks," the castle was finished. The Unicorns would have celebrated, but by then, they were hunted into extinction by a bunch of Albino Pygmy French Men.
The Pygmy French Men saw promise in the castle, so they used it as a Unicorn Fur Emporium. They got good business, until the Tookalookalas bought them out, due to numerous Software invenstments.
Eventually, the Tookalookalas sold the castle to an up and coming Stand-up comedian, who only used the place to stuff dead owls which he would occasionally "find" dead in the back seat of his car.

However, he was arrested and was forced to put the place up for Police auction where it was bought by Harold, the Astral Knight.
During a great struggle with Glogdar, the Devourer of Twinkies, Harold had to pass the torch onto Jaynin, a simple proofreader for a well known Gay Porn magazine.
He took up the mantle and since Glogdar was already dead, he successfully urinated on his tombstone, only to recieve genital warts as a result, but he was healed within weeks thanks to a magical ointment given to him by a crazy old lady, who placed a curse on him that he would no longer have a major role in any major plots.

And THAT is how the castle went from then to now.