Sant'Elena is an island of Venice. It lies at the eastern tip of the main island group and forms part of sestiere of Castello. The original island was separated by an arm of the Venetian Lagoon from Venice itself, and was centred on the Church of Sant'Elena and its monastery, originally built in the twelfth century and rebuilt in the 15th. The island has since been expanded to fill in the gap and is linked by Venice by three bridges. It includes the Rimembranze Park, a naval college and a football stadium, Stadio Pierluigi Penzo, in addition to residential areas and Venice Biennale buildings. The belltower has a ring of 6 bells in B rung with the Veronese bellringing art.
You can reach the island either by ferry - "Sant'Elena" stop - or by foot from the train station (about 1h walk).