Hi Customer (name blocked for privacy),
It really depends where you're from, where exactly you are going and the method of travel you chose.
That being said, dogs and other pets are generally very well accepted:
http://europeforvisitors.com/europe/articles/europe_for_pets.htm
If you're traveling by plane, you can definitively book a place for your dog. Most airlines charge a special fee for this and some require immunization records. All airlines also require a travel cage for your pet and or a muzzle.
http://www.nolo.com/article.cfm/objectID/9D7B6272-6049-4929-9816F017ADADAED3/104/284/294/FAQ/
Edit: just noticed you were traveling by boat. - The same rules apply, and it usually costs anywhere from $30 to $90 depending on the carrier.
If you'd like me to quote you different carriers and prices, I will be happy to do so, just let me know
Hope this helps!
Patrick
Edited by PatrickG on February 7 2007 at 12:51 AM
If you require clarification or would like additional detail on a particular item, please just let me know I will be happy to assist!
Thanks,
Patrick