The Alipore Zoological Gardens (also informally called the Alipore Zoo, Calcutta Zoo or Kolkata Zoo) is India's oldest formally stated zoological park (as opposed to royal and British menageries) and a big tourist attraction in Kolkata, West Bengal. It has been open as a zoo since 1876, and covers 18.81 ha (46.5 acres). It is probably best known as the home of the now expired Aldabra Giant Tortoise Adwaita, which was reputed to have been over 250 years old when it died in 2006. It is also home to one of the few captive breeding projects involving the Manipur Brow-antlered Deer. The zoo has drawn a lot of criticism from the zoo community and conservationists in the past few decades, mainly for its cramped cages, as well as for its Panthera hybrid breeding program. But, it is now modernizing rapidly. New glass-walled enclosures and aviaries have been built. The earlier main entrance has also been shut down, and a new, much better one, with electronic entry has been opened. As a result, the ticket prices have doubled from Rs. 10 to Rs. 20.