What's the one wicked Massachusetts thing you think visitors should experience?

Get a glimpse of the Sacred Cod? Eat a lobster roll on Cape Cod?

Watch for whales, or take a Thoreau-ly refreshing dip in Walden Pond?

As visitors pour into Massachusetts for the World Cup this summer, there's no end of suggestions for things to check out in our great state.

But vacations aren't infinite, and no one knows a place like a local. So we want to hear from Bay Staters: What do you think is the most Massachusetts thing tourists should experience here?