File:This photo is from 1974, 2 years after the current visitor center opened. The building remains, but nothing in this picture is (f5b8c7f5-fac4-045a-df23-5b29d9064da1).jpg
![File:This photo is from 1974, 2 years after the current visitor center opened. The building remains, but nothing in this picture is (f5b8c7f5-fac4-045a-df23-5b29d9064da1).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/0/05/This_photo_is_from_1974%2C_2_years_after_the_current_visitor_center_opened._The_building_remains%2C_but_nothing_in_this_picture_is_%28f5b8c7f5-fac4-045a-df23-5b29d9064da1%29.jpg/800px-thumbnail.jpg?20240517032936)
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