There is a church and a cloister on this island (its history dating back to the 11th century), as well as beautiful public gardens with a lovely view of the whole city. Take a peaceful walk around and admire the sights. Notice how several different architectonic styles are blended together in the church since during its history it was rebuilt several times.
Wikipedia https://en.wikipedia.org/wiki/Sant'Elena
Address Campo de la Chiesa, Venezia 30132, Italy
Coordinates 45°25'37.654" N 12°21'56.39" E