National parks and reserves

Left to right: Ann (Mrs. Oscar) Chapman; Secretary of the Interior Oscar Chapman; James Chapman; and Superintendent Guy D. Edwards at Shenandoah National Park.

Left to right: Ann (Mrs. Oscar) Chapman; Secretary of the Interior Oscar Chapman; James Chapman; and Superintendent Guy D. Edwards at Shenandoah National Park.

Secretary of the Interior Oscar Chapman (left) with Superintendent Guy D. Edwards at Shenandoah National Park.

Secretary of the Interior Oscar Chapman (left) with Superintendent Guy D. Edwards at Shenandoah National Park.

Left to right: Ann (Mrs. Oscar) Chapman; Secretary of the Interior Oscar Chapman; James Chapman; and Superintendent Guy D. Edwards at Shenandoah National Park.

From left to right: Thomas "Cal" Miller, Superintendent, Mammoth Cave National Park; Elbert Cox, Regional Director, National Park Service; unidentified; Secretary of the Interior Oscar Chapman; and Conrad L. Wirth, Director, National Park Service outside the information booth at Mammoth Cave National Park in Kentucky. Park ranger unidentified. From: Oscar Chapman Scrapbook

From left to right: unidentified; Secretary of the Interior Oscar Chapman; and Thomas "Cal" Miller, Superintendent, Mammoth Cave National Park outside the information booth at Mammoth Cave National Park in Kentucky. Park ranger is unidentified. From: Oscar Chapman Scrapbook

Secretary of the Interior Oscar Chapman (right) and son James inspect earthquake cracks near Halemaumau volcano in Hawaii Volcanoes National Park. From: Oscar Chapman Scrapbook

President Truman signing the guest register at the Paradise Inn Hotel in Mount Rainier National Park. He is outside, and snow is shown all around the President. This is an International News Photo by Hack Miller, published by Life Magazine.

Picture of the Grand Tetons and the landscape of Jackson Hole, Wyoming. Senator Joseph C. O'Mahoney sent this photo to President Harry S. Truman, proposing to create a presidential summer home on the site.