Crossrail. If you didn't already know it, this is the name of the major new rail development connecting Berkshire and Buckinghamshire to Essex and Kent, scheduled to open in 2018. It's Europe's biggest ever construction project and involves the building of at least six new stations in London, all of them deep down below the streets of the capital.
With so much excavation taking place, it's little surprise that various artefacts from days gone by (like 55 million years ago) are turning up.
A pop-up exhibition a couple of months back that showed a selection of the finds proved so popular that the organisers are bringing it back – with new archaeological finds – for almost the entire month of October.
More than 100 items of interest will be on display, including 55 million year old amber, a skeleton from the Bedlam psychiatric hospital, and a silver coin from Roman times, and a small section of mammoth jaw bone.
If your interest extends further, be sure to arrive early on any Wednesday during the exhibition's run to catch one of the free seminars given by expert archaeologists working on the project. These take place from 6.30pm to 7pm, with places given on a first come, first served basis.
Seminars: 3 October – Crossrail's ambitious archaeology programme 10 October – Uncovering Bedlam under Liverpool Street and London's greatest ironworks at Limmo Peninsula 17 October – Discovering a Tudor manor house at Stepney Green 24 October – Paddington's prehistoric animals and the coming of the railway
Construction and excavation is ongoing, so you never know what you might come across at this remarkable exhibition.
You can catch it at the Crossrail Visitor Information Centre on St. Giles High Street close to Tottenham Court Road from 2nd October to 27th October on Tuesdays, Wednesdays and Thursdays from 11am to 7pm, and on Saturdays from 10am to 5pm.
If you're at all interested in London's ancient history, this free exhibition is one of the capital's must-see events of the year.