Monica & Chandler got married in The Pierre Hotel in New York City. I have just visited New York and saw the hotel for myself; I'd include a picture I took myself, but I can't add it onto this...
At the end of Friends, Monica and Chandler save him a room in their new house for when he comes to visit (a 'Joey room') but he stays living in his apartment.ALSO--to find out more about Joey's life...
They were in London and Monica was drunk, she went up to Joey and Chandler's room to hook up with Joey, Joey was away so she saw Chandler as her second choice, that's where their relationship started.