Elsbridge Viaduct is a bridge on Thomas' Branch Line that crosses the River Els. It was finished in 1925 when the line was being extended from Elsbridge to Ffarquhar. Thomas once "went fishing" here when he needed water. The bridge is made of brick and has multiple arches. In the television series, it only appeared in the first season.
- It is based on the Maidenhead Railway Bridge, also known as the Maidenhead Viaduct or The Sounding Arch, which was built by Isambard Kingdom Brunel, that carries the Great Western Railway over the River Thames at Maidenhead.