1 No, it is not Hogwarts.
2 Yes, it is a part of the Magical World.
3 Yes it is a part of the UK Magical World.
4 No, Harry does not visit this place in the first book.
5 Yes Harry visits this place.
6 It is never disclosed whether this place is within a buliding or is the building itself, but don't get hung up on this weird answer.
7 No this place is not within the Hogwatts environs.
8 No, it is not King's Cross
9 No it is not St Mungo's Hospital for Magical Maladies and Injuries
10 No, it is not a natural location.
11 See the reply to # 6 Since this question was asked in a different wording, this round is expanded to 21 Questions.
12 No it is not someone's house.
13 No it is not the Department of Mysteries.
14 No, it is not Azkaban
15 No, It is not the Ministry of Magic.
If I may add a note: Judging from the questions you are not asking, it may be that you might reconsider your interpretation of the answer to one of the first 7 questions.
16 No it is not a pub, altho a pub can be involved in getting there.
17 No it is not in Hogsmeade.
18 No it is not the Room of Requirements
18A No it is not Diagon Alley, but is within Diagon Alley
19 No it is not Knockturn Alley
20 No it is not Weasleys Wizard Wheezes.
One more question in regulation play, but please keep trying to solve this one. And do remember questions 4 and 5.
21 No, it is not Godric's Hollow.
22 
Yes it is Florean Fortescue's Ice Cream Parlor Congradulations What's your favorite?
It's your turn agnijay
