A centre for spotting birds and sea mammals off the coast of Suffolk opened on Tuesday.
Bottlenose dolphins have been seen off the east coast
The lookout tower at the Coastguard Cottages at Dunwich Heath and a former World War II generator shed have been converted into the Sea Watch Centre.
Powerful telescopes and binoculars have been installed to give visitors the chance to look for birds and mammals such as porpoises, seals and dolphins.
The centre is being opened as part of National Whale and Dolphin Watch Week.
Some 28 species of whales and dolphins have been recorded off the British coastline.