Under the city of San Sebastián in northern Spain, excavation of Topo tunnel continue. 90% of the route of the 4.2 kilometers of the Topo tunnel under the center of the city already excavated according to the Minister of Transport, Iñaki Arriola.

https://www.noticiasdegipuzkoa.eus/gipuzkoa/donostia/2021/02/13/90-trazado-excavado/1089022.html