The Oldest Surviving Buildings In The World

Wayland's Smithy (c. 4th Millennium BC) England
It makes sense that Wayland's Smithy, one of England's oldest standing structures, is located along the Ridgeway, its oldest existing road. Measuring 85 miles from Overton Hill to Ivinghoe Beacon, the Ridgeway is roughly 5,000 years old and dates back to the Bronze Age.

As for Wayland's Smithy itself, the Neolithic long barrow was constructed around 3400 BC (though it was built atop an older structure that dates to approximately 3500 BC). The Saxons believed it was the home of Wayland, a legendary blacksmith in Scandinavian, Germanic, and AngloSaxon mythology.