Thousands of tonnes of rock are being placed in a Dorset harbour - as work to build a marina with Olympic and Paralympic sailing amenities continues.
Work on the marina is due to be finished by the end of 2008
Weymouth and Portland Borough Council gave planning permission for the £21m Portland Marina at Osprey Quay in June.
About 200,000 tonnes of Portland Stone are being brought in to build a stone breakwater and to reclaim two acres (0.80 hectares) of land from the sea.
In recent weeks, work has also begun on the foundations for new pontoons.
If it goes to plan, the Dorset town will be the first in England to build a permanent venue for the 2012 Olympic and Paralympic Games.
The plans include a 560-berth marina, to be sheltered by the stone breakwater.
Work is due to be finished by the end of 2008.
About 200,000 tonnes of stone will be used to build a new breakwater
Hampshire-based firm, Dean and Reddyhoff, of Gosport, was selected to develop and operate the marina.
There will also be an on-shore reception centre with washrooms, showers and laundry facilities and a restaurant bar overlooking the harbour.
About 250 marina berths are expected to be used during the 2012 Olympic and Paralympic sailing events to accommodate safety boats, media vessels, official race boats and other support craft.
Councillor Geoff Petherick, Weymouth and Portland Borough Council's spokesman for employment and prosperity, said: "This development is part of the plan and vision for the future prosperity of Weymouth and Portland.
"There is currently in the region of £400m worth of regeneration projects and investment, either in place or in the pipeline for the borough."