On the Rose Kennedy Greenway (formerly the dark place under the overpass) in Boston

Eamon, Desmond, and Conor who are fascinated by a fountain in which they have been forbidden to get wet

I think that's the Longwharf Marriott in the background on the right

Desmond, delighted, Eamon, and Conor, also transfixed

There's nothing quite like a well-designed fountain to capture the kid imagination.