Rubber boots come in handy in Venice today. Two days of flooding have made life miserable in Italy's city of canals.
City officials say the water was thigh-high in some areas -- the highest level in 20 years. So for our Geo Quiz - we wanted to know the name of the city's landmark piazza. It's one of the lowest points in the city.
Franco Debernardi/Getty Images
Roberto Caruti runs a gourmet food and wine shop called "I Tre Mercanti" - the three merchants.
The answer is Saint Mark's Square/Piazza San Marco in Venice Italy.
More photos of the flood