16 Meter beneath Berlin Tiergarten three vast tunnels give a glimpse of Adolf Hitler’s megalomaniac vision of a new architectural centre for the capital of Nazi Germany. The tunnels were constructed in 1938 as part of an underground transport network beneath a series of bombastic buildings designed by Nazi architect Albert Speer, including the biggest domed hall the world had ever seen. The overground plans, never completed because of World War Two, included boulevards, squares and huge buildings,. Hitler called the concept, a symbol of the power of the Third Reich, “Berlin — the capital of the world” but in recent times it has come to be known as “Germania”. The tunnels, between 90 and 220 meters long lying beneath the Tiergarten park, would have accommodated roads and a railway line. I visited the tunnels in 2009.