This has turned into an interesting debate about Woodland Park Zoo, which I am obviously famliar with (see the ZooChat gallery photos

) and thus I'd like to addess a few things. The zoo is famous for its many award-winning exhibits, and even if some individuals argue that the AZA-awards are a little suspect (and that has some validity) there is no denying the number of brilliant animal enclosures at the zoo. In 1979 the first ever naturalistic gorilla exhibit on the planet opened in Seattle, and the 1976 long-range plan is seen as the begining of a new, immersion-rich zoo experience that was sometimes copied all around the globe at many different zoos.
Quite often the late 1970's and early 1980's (long-range plan in '76, gorillas in '79, African Savanna in '80, snow leopards in '82) is regarded as the heyday of the zoo. I beg to differ, as in reality it was the late 1980's and into the mid-1990's where this zoo really blossomed with new exhibits. Elephant Forest in 1989, Tropical Rainforest in 1992, Northern Trail in 1994 and Trail of Vines in 1995 ALL won AZA Best Exhibit awards, which then placed the Woodland Park Zoo at # 2 behind only the Bronx in that category. Between 1989 and 1995 there was also an animal hospital, gift shop and education center built, and everything was just over $50 million. Wow, how costs have escalated since then!
The kid-friendly elements of Woodland Park Zoo are still there, even though the pony ring was phased out about 5-6 years ago. The difference with this Seattle zoo is that all of the children areas are separate from any of the exhibits, and it is possible to stroll around the zoo and not realize that it is a child-based attraction at all. There is a "Habitat Playground" near the Temperature Forest zone, but it is behind a low wall and set apart from the walking trail. That playground is entirely outdoors and it has "burrows" for kids to tunnel through, a giant "spider web" for climbing, and various bridges and naturalistic items to climb on. There is the "Family Farm" which is in the same area, but again it is separate from any major walking trails.
I fully admit that the zoo has become more kid-friendly in the past few years, as "Willawong Station" opened in 2005 (feed budgies and lorikeets for a dollar), "Zoomazium" in 2006 ($10 million all-indoor playground) and the "Historic Carousel" also in 2006. The best part of these 3 new attractions is that they are all tastefully done and do not interfer with the promotion of the zoo as a serious, conservation-minded establishment. The historic carousel is at the top of the North Meadow and far away from any animal exhibits, "Willawong Station" is a small, enclosed building that muffles the excitement of children, and "Zoomazium" is spectacular and environmentally friendly but again is totally enclosed and thus children can yell and scream to their heart's content without annoying anyone passing by outside. Three great kiddie attractions, and all three are far apart from animal exhibits and the noise is contained for everyone else walking by. That is much different from countless other zoos I could name, where it seems as if rollercoasters, rides, playgrounds, etc are all much too close to animals in enclosures and humans wanting a small degree of serenity. I feel as if Woodland Park has fairly recently branched out and accepted that children are a massive part of both their present and future, but the zoo has managed to create three kiddie attractions that are TASTEFULLY constructed. Also, within the past few years brilliant habitats for jaguars and penguins have been erected for the zoo lover who appreciates naturalistic, award-worthy exhibits. Everyone wins!
As far as attendance is concerned, before the historic 1976 long-range plan the zoo averaged just over 600,000 visitors a year, and then attendance shot up with all of the exciting, naturalistic enclosures that were created to about 800,000. I don't have any data that shows attendance between the mid-1980's and early 1990's, but since the flurry of new exhibits in the early 1990's for the past 15 years the zoo regularly has received about a million visitors a year, and in 2008 there were 1.1 million visitors at the zoo.
Interestingly enough, the Oregon Zoo has staggering attendance numbers, and in 9 of the past 11 years the all-time attendance record has been broken at that zoo. In 2008 there were 1.6 million visitors to the zoo in Portland. I would guess that 9 out of 10 ZooChatters who have been to both zoos would agree that while Oregon has some nice exhibits overall Woodland Park is easily the better all-around zoo. So why is Oregon so popular? One factor is that the "Christmas Lights Festival" significantly bolsters their numbers each December, and that is something that Woodland Park does not do. Also, there are far more tourist attractions in Seattle (Space Center, Seattle Art Museum, waterfront restaurants, Seattle Aquarium, Experience Music Project & Sci-Fi Museum, Point Defiance Zoo & Aquarium in Tacoma, Museum of Flight, Museum of Glass, Argosy Cruise Lines, etc) than in Portland.