What is Hogwarts?
Wikipedia defines Hogwarts as, "Hogwarts School of Witchcraft and Wizardry, shortened Hogwarts, is a fictional British school of magic for students aged eleven to eighteen, and is the primary setting for the first six books in J.K. Rowling's Harry Potter series."
What is Hogwarts is Here?
Defined by themselves, "Hogwarts is Here (#HiH) is a website created by the fandom in order to simulate the magic of Hogwarts in an online environment. All of our content was written by volunteer fans."
Link: HiH
Link: HiH