All Hotspots are shown on the maps like this:
Hotspot 18
In the Piazza, the sun feels so sweet,
With a drink and a seat as a treat.
As the opera rings out,
With a beautiful shout,
It makes every moment complete.
The market hall echoes the sound,
While visitors gather around.
By the stalls of the trade,
In the light and the shade,
The most beautiful music is found.
But watch where you step as you go,
On the cobblestones laid out below.
They are tricky to tread,
So use caution instead,
And keep your pace steady and slow.