I Want to treat the missus and take her away somewhere for 2/3days and i'm stumped on where to go (Her birthday is Mid-March, mine is one day before)

The stumbling block is that i can only take her away for 3 days tops Mon/Tue/Wed as she has to be back in school teaching on Thursday 8am...

Wouldn't mind either going over the water somewhere or maybe Alton towers for a day or two....

Help with some ideas lwould be great!