Trans-Caucasus Railway (S03E04)

Chris Tarrant embarks on a journey along the historic Trans-Caucasus Railway, starting in Baku, Azerbaijan. He delves into Tbilisi, the capital of Georgia, where he navigates its charming vintage metro system. His adventure continues with a visit to a striking mountain rail bridge designed by Eiffel, culminating in a fascinating tunnel that is said to be constructed with egg yolk.