that its yellow
parties
Big Ben isn't open to the public except by special invitation from a Member of Parliament.
That would be a proper noun. For example: Selena is at Big Ben. The words with capital letters are called proper nouns.
The Queen has been there
Yes. It is a very famous landmark in London and attracts many tourists. Big Ben actually refers to the bell inside the tower, so most people only ever see the tower and it is incorrectly often just called Big Ben.
The clock has become a symbol of the UK and London
Yes, Big Ben is still called Big Ben.
Big Ben !
Big Ben is in London, England.
It isn't possible to visit inside Big Ben as an overseas tourist. British tourists can visit inside Big Ben only on invitation by their own Member of Parliament. Most visitors to London will want to see Big Ben but that can only be done from outside the building. The most popular paid for tourist attraction in London is the London Eye which is located adjacent to Big Ben.
the main bell, the one that chimes the hours, is Big Ben.