Editing Great Eastern Main Line (section)

====Stoke tunnel====
The only tunnel on the line is immediately south of {{rws|Ipswich}} station. The {{convert|361|yd|adj=on}} long tunnel was built by [[Peter Bruff]] as part of the [[Ipswich to Ely Line|Ipswich & Bury Railway]]. It was completed in 1846 and it is thought to be the earliest driven on a sharp continuous curve.<ref>{{cite book|author=Moffat, Hugh|title=East Anglia's First Railways|publisher=Terence Dalton|location=Lavenham|year=1987|isbn=0-86138-038-X}}</ref> During the excavation of the tunnel, many important fossils were discovered, including rhinoceros, lion and mammoth; the site was known as the "Stoke Bone Beds".<ref>{{cite web|url=http://www.sevenwondersofipswich.co.uk/wonders/show.php?num=5|title=Mammoth on High Street|work=Seven Wondered of Ipswich|access-date=30 March 2010}}</ref> The finds are considered important in understanding [[Climate change (general concept)|climate change]] during the [[Last Glacial Period|Ice Age]].<ref>{{cite web|url=http://www.ipswich.gov.uk/site/scripts/documents_info.php?documentID=694&pageNumber=7|title=Collections:Geology|publisher=Ipswich Borough Council|access-date=30 March 2010}}</ref> This tunnel had the trackbed lowered so the line could accommodate taller freight trains.