Lisbon in $470s-$490s RT

This deal is really a Choose Your Own Portuguese Adventure game...

After your plane touches down, do you:

• Stay in Lisbon and munch on pastel de nata while you dive into the thrills, chills, and hills of the big (and old) city?
• Follow your inner aristocrat and head down to this ultra-beautiful, ultra-romantic town, once the favorite summer retreat of Portuguese royalty? (You can get amazing pastries here too, don't worry.)
• Avoid the crowds and make a beeline for the untamed coast, where sleepy surf towns lie side-by-side with ultra-chic resorts?
• Do all of the above, thanks to Portugal's fabulous rail system?

We know which one we'd pick :-)