One of the most iconic American landmarks has been looking tired recently.

On December 23, the image of Mount Rushmore began changing slightly - with smaller and smaller peaks appearing on the mountain. These are repeats of "Where's Waldo?" faces that people use to pull a hidden target out of a book.

Heavy rains in December flooded parts of South Dakota. But there's more to it than that. The White House proclaimed December 23 to be "We Got You" day in South Dakota, where more than 240,000 copies of a nationwide free book went out. Books were distributed by the community organizations and community centers. On the back of the book, a little brown icon said, "Where's Waldo?" All eyes were on Rushmore to see what their faces might look like.

The "Where's Waldo?" faces were placed on Mount Rushmore early December, after work was done to clean up avalanche debris and allow visitors to see the "Where's Waldo?" face in its natural state. On December 23, the book went out to the public with Rushmore's image included.

On December 30, according to a statement from the National Park Service, an area burn scar had "simply grown to large enough to obscure its original appearance." You can view the "Where's Waldo?" faces in all their glory by clicking the magnifying glass in the image below.

At the top, you'll see at least 3 of the famous figures.

Waldo is now some 20 feet lower and looking like Waldo 2nd Edition 2 feet to the right and 25 feet to the left. It will take a little longer for Waldo to get back up to the top of the mountain, the White House said, but it should be back to normal this week.

(Information from: bbu tv, CNN)