Park rangers at Great Smoky Mountains National Park were pleased to see an apology in the mail that included the return of stolen park property.

A tourist named Karina decided she loved the Deep Creek area of the national park so much that she wanted to take a "souvenir" home with her – a heart-shaped rock.

"I especially liked Tom Branch Falls," which is in North Carolina, Karina wrote.

"I'm sorry, and I want to return it," Karina said of the rock. "Also, here's a donation!"

Park rangers posted the apology letter on Facebook, along with a photo of the rock being returned to Tom Branch Falls and a hand-drawn picture of Tom Branch Falls.

The post does not include Karina's age.

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"Thank you so much for returning the rock!" rangers posted on Facebook. "It has made its way back to Tom Branch Falls. We are so glad you enjoyed your visit. Already, you are becoming an amazing steward for the park. Thank you for recognizing that what is in the park should stay in the park."

Taking the rock is a bit of a big deal – it's illegal.

"If every visitor took a rock home, that would mean 11 million rocks would be gone from the park every year!" park rangers wrote on Facebook. "The park would definitely not be as beautiful as it was before."

Rangers also mentioned that rocks in the Smoky Mountains provide homes for "hundreds of creatures."

"Now that you know to leave nature the way you find it, we hope you will help share this message with others," rangers said.