A worker is seen inside the Cuncas II tunnel that will link the canals being built to divert water from the São Francisco river for use in four drought-plagued states in Brazil, a project that is three years behind schedule and has doubled in cost from the original estimate of $3.4bn, near the city of Mauriti, Ceará state
A Crossrail tunnel under construction 35 metres below the streets of Whitechapel, east London, one of the most challenging sites in the Crossrail project. The completed service will run from Maidenhead and Heathrow in the west to Shenfield and Abbey Wood in the east. Construction is expected to be completed in 2017, with services running in 2018. Read more
A worker inspects the first completed section of London’s new Crossrail tunnel, which will provide new train links across the UK capital to Heathrow airport. Tunnelling machine Phyllis completed the 6.8km section between Royal Oak in the west and central Farringdon after 18 months of work. Crossrail, Europe’s largest construction project, is expected to be finished in 2019. Read more
Ahmed Zakot /Reuters
A tunnel worker ascends on a rope inside a smuggling tunnel dug beneath the Gaza-Egypt border in the southern Gaza Strip. Hamas is struggling to meet its payroll in the Gaza Strip, where income from taxes has been badly hit since neighbouring Egypt started destroying a network of tunnels used to smuggle food, fuel and weapons into the Islamist-run enclave.