London is the capital of England I am thinking of taking a trip there.
That sounds amazing!  I would love to go there!  Is London the capitol?
It is! It was founded by the Romans,.
Really?  The Romans were all the way up in England?  That is fascinating.
the City of London largely retains its medieval boundaries so that is the main reason I want to go
The history of the city seems intriguing.  Are there any cultural elements from the Romans remaining in the city?
The roads and sewers, London is a leading global city in the arts, commerce, education today but I have heard that it is kinda going downhill
What do you mean by going downhill?  Are you referring to crime and infrastructure?