The Rio–Antirrio bridge is a multi-span cable-stayed bridge that crosses the Gulf of Corinth between Rio on the Peloponnese and Antirrio on the mainland of Greece. Construction started in 1998 and opened just before the Summer Olympics in Athens in 2004. The bridge has reduced the travel time from 45 minutes that the ferries use to 5 minutes. The Rio – Antirrio bridge is 2880 meters long and the three largest spans are 560 meters. The bridge has 4 towers that go up to 65 meters below the sea. The bridge is designed to withstand earthquakes of 7.5 on the Richter scale.