Upload Photo
Amur tigers walk across a passageway after a
Caption / Share

Amur tigers walk across a passageway after a new conference at the Philadelphia Zoo, Wednesday, May 7, 2014, in Philadelphia. The see-through mesh pathway called Big Cat Crossing is part of a national trend called animal rotation that zoos use to enrich the experience of both creatures and guests.(Credit: AP / Matt Slocum)

1 of 6

Share this photo

Philadelphia Zoo lets tigers stretch their legs

Visitors to the Philadelphia Zoo might want to beware of stray cats: A new enclosed passageway allows lions and tigers to roam outside their exhibits along new mesh catwalks. The protected, open-air path snakes above the felines' habitat to an archway over the zoo's main promenade and ends at a viewing spot along a lake.