Philly zoo lets tigers stretch their legs on trail

    Beware of stray cats at the Philadelphia Zoo.

    A new enclosed passageway called Big Cat Crossing allows visitors to safely watch as lions and tigers roam outside their habitats.

    The protected, open-air path is being unveiled Wednesday. It’s part of an effort to enrich the experience of both creatures and guests.

    The 100-yard-long trail snakes above the cat exhibit. Visitors then can watch the sleek felines cross an archway over the zoo’s main promenade to a viewing spot at a lake.

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    The zoo already has separate trails winding through its property for large apes and small primates. Officials say the campus-wide system is unique among zoos in the U.S.

    Big Cat Crossing will be in regular use starting Saturday.

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