What's the best way to get from Barcelona to Bilbao?

Question

Should I take a day trip to Bilbao, or is there enough to do to justify an overnight stay? Mainly I want to visit the Guggenheim.

Answer 1

Too far for a day trip.  You might want to consider visting Bilbao and staying overnight in San Sebastian -- less than an hour form Bilbao and the greatest food in the World.

Answer 2

From Barcelona to Bilbao is a full day on the train.  I wonder how you planned to travel, plane, maybe?  Still seems a long way, just to see the Guggenheim (which is all I want to see there, and Í'm not even interested in what's inside, only the building itself - isn't that awful!?)

I wouldn't pair it with a trip to Barcelona, i'm planning it on a trip to the north coast of Spain...it seems more logical.  

Tons of neat side trips closer to Barcelona.