Unique in Greece, the Rotunda is a cylindrical building from the early 4th century AD. The mosaics inside are really impressive. The Rotunda is a massive circular structure, built in 306 AD, with a masonry core. Through its long history, it has gone through multiple periods of use and modification as a polytheist temple, a Christian basilica, a Muslim mosque, and a Christian church once again. A minaret is preserved from its use as a mosque, and ancient remains are exposed on its southern side. Some Greek publications claim it is the oldest Christian church in the world. These days, the Rotunda is primarily an archaeological site, where you can see some remaining Christian mosaics and feel the weight of history.

Santa Maria dei Miracoli is the most requested church for weddings in Venice, and if you step inside, you'll easily see why. It is said to be built from the leftovers of St Mark's Basilica. Being one of the best examples of early Venetian Renaissance architecture, its nickname is "the jewel box" due to its striking beauty.

Peggy Guggenheim, the wife of the artist Max Ernst, once resided in Palazzo Venier dei Leoni, which now serves as a museum that houses her remarkable art collection, featuring works from Europe and America dating back to the first half of the 20th century.