Erzurum - Tekman arasındaki Palandöken tüneli (Rize-Erzurum gidiş gelişi ile)
Palandöken tunnel between Erzurum and Tekman (Rize Erzurum route also)HS2 Aerial view looking directly down the shaft at Little Missenden
HS2 Aerial view looking directly down the shaft at Little Missenden from:https://mediacentre.hs2.org.uk/news/tunnel-progress-as-hs2s-florence-and-cecilia-reach-little-missenden
cover tunnel photo by: Matt Brown from London, England / CC BY
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