The Arkadiko Bridge in Mycenae, an archaeological site in Greece, is the oldest surviving bridge that can still be used; it dates to between 1300 and 1200 B.C. Remnants of bridges dating back to 1600 B.C. also exist around Mycenae.
According to Guinness World Records, the oldest bridge still in use crosses the river Meles in Izmir, Turkey. The slab-stone single-arch bridge dates back to about 850 B.C.
According to The Telegraph, the oldest bridge that still exists in its original state is the Pons Fabricus, which has been in use since it was built in 62 B.C. This Roman bridge, built from bricks, rocks and limestone, connects Tiber Island to Campus Martius across the Tiber river.