A stretch of the Suffolk coast - sealed off for decades to allow top-secret research - is to reopen to the public on Saturday after repairs to the quay.
Orford Ness - dominated by two reinforced concrete pagodas used to test atomic bombs - was abandoned by the Ministry of Defence in the 1980s.
It was bought by the National Trust and has been left for wildlife to grow.
Repairs to Orford Quay have been made to allow visitors to be carried over the river to the shingle bank.
A spokesman for the trust said: "Orford Ness isn't your typical National Trust property, but it is strangely beautiful in its own special way."
Boat trips to Orford Ness begin on 17 May.