The Pru is wonderful for shopping and has great restaurants! It is a quick walk from both hotels!
The Boston Common is a beautiful park to walk around with a coffee in the morning before the festivities begin!
Newbury Street is full of shops and restaurants to bop around!
The Charles River is where Brian proposed! Beautiful place to go for a walk or run! If you walk straight along Clarendon St from the Westin or Fairmont, you will reach Storrow Drive where there are walking bridges over the street to get to the Charles. It is about a 10 minute walk to get there from both hotels.