The U.S. Geological Survey shows what visitors leave behind in Yellowstone National Park

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This lion named Nzuri has a thick, shiny, and perfectly curled mane, looking like he just stepped out of a high-end hair salon. (Shot by Kambiz Cameo Pourghanad)

In 1920, a year before work began on the Reflecting Pool, the view toward the Lincoln Memorial looked like this.

The muscular cat spotted on the streets of Istanbul