Mark Burns spent five years visiting all 59 of the United States' national parks. Captured in stirring black and white images, his landscape photography project was completed just in time for the National Park Service's centennial celebration. “It's a time to reflect on the rich history of our national parks,” Burns said of his 160,000-mile journey, “but it's also a time to plan wisely for the next 100 years.” Glacier Bay's wild coastline, Death Valley's parched terrain, and Yellowstone's surging geysers are all pictured in searing detail. One image from each park is currently being exhibited at the Houston Museum of Natural Science until September 28th. A selection can be found below.