Covering an expanse of 2,500 square metres, visitors will enter 'Land of the Lions' through a grand stone archway and explore Sasan Gir Train Station - where an odd lion might be spotted snoozing on the tracks or roaming just metres away, separated only by wires.
The new exhibit at the world's oldest scientific zoo will be home to four Asiatic lions and has been set up to transport visitors from the heart of London to the vibrant setting of Sasan Gir in Gujarat in India - the last remaining stronghold of Asiatic lions.
The four Asiatic lions housed at the exhibit are named Heidi, Rubi, Indi - all females, and Bhanu - a male.
The 89-year-old Queen unveiled a large plaque to commemorate the opening yesterday. The Duke of Edinburgh, Prince Philip, who accompanied her was presented with a painting by Edward Lear circa 1835 of an Asian lion along with the publication 'The Maneless Lion of Gujarat'.
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The Queen also received as a gift a photograph of her visit to the zoo 40 years ago when she opened the New Lion Terraces at almost the same spot.
The Asiatic Lion exhibit project, which is located next to the Ambika Paul garden, is "based on the lions of Gujarat", said Paul.
"The Land of the Lions is a wonderful way for people to see Asian lions in an authentic setting. It is next to the Ambika's statue (set up in memory of Lord Paul's daughter).
"We are really grateful to the Queen and the Duke for inaugurating the exhibit. It will be open to visitors from March 25," the 85-year-old industrialist said.
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Gitanjali Bhattacharya, head of the zoo's conservation
programmes for South and Central Asia, said: "It's about being in the heart of London but being immersed in the Indian forest.
"I have been to Gir and it's absolutely stunning but to stand in the centre of the Land of the Lions, you feel like you've been transported to India. Every time you turn a corner you see something from Gir."
Bhattacharya said: "In Gir, you have this species living in harmony with humans.
"For children to be able to stand in the middle of the exhibit and be so close to the lions, it almost seems like there will be no barriers between the people and the species. It's hugely exciting."
The Asiatic lion tends to be slightly smaller than its African cousin. It is listed as endangered and last year there was a population of only 523, all in Gir national park. But numbers have increased since they were almost wiped out by hunters at the start of the 20th century, when only 20 remained. Lions hunts are now outlawed.