Here's an interesting link: www.norwayheritage.com/ ... and it isn't only about Norwegian heritage.
The site gives in-depth information on the great shipping lines e.g. the White Star Line - their Colonial Service brought so many of our ancestors to South Africa and Australia. You can search by line or by name of ship e.g. Persic. Pictures of ships are also included. Good background material for a family history narrative or just have fun exploring the site. You're guaranteed to discover some new and fascinating maritime facts.
Incidentally, the 'Passenger's Contract Ticket' of 1900 pictured below looks like the real thing but is a clever fake - right down to the sealing wax. Makes you think, doesn't it? Have another look at those 'original documents'.