Database Normalization

Question

I\'m new to database design and I have been reading quite a bit about normalization. If I had three tables: Accommodation, Train Stations and Airports. Would I have address

Answer 1

Would I have address columns in each table or an address table that is referenced by the other tables?

Can airports, train stations and accommodation each have a different address format?

A single ADDRESS table minimizes the work necessary dealing with addresses - suite, RR, postal/zip code, state/province...

Is there such a thing as over-normalization?

There are different levels of normalization. I've only encountered what I'd consider poor design rather than normalization.