The UK's first underwater viewing zone for giant otters is to open next week.
The owners of Chester Zoo in Cheshire say the development will "breathe fresh life into the zoo".
At a cost of £250,000, the giant otter centre is one of the only places in Europe where people can see the otters diving for food, through large underwater viewing windows.
The new exhibit also features an undercover seating area, a crawl-in viewing dome and state-of-the-art "cubbing dens".
Simon Mann, Chester Zoo's development director, said: "This new enclosure is at the absolute cutting edge of design in terms of both animal welfare and the exciting viewing opportunities it offers the public.
"Giant otters are charming animals and it's fascinating to see them swimming underwater. We think people, and the otters, are going to love it."
The zoo has also built a new-look jaguar enclosure and the two new attractions will be open for the February half-term.