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Vanessa Hudgens and her boyfriend, Austin Butler, are under investigation by the National Forest Service, aka, the federal government, for allegedly defacing a prized possession in an Arizona park.

According to an Instagram post that has since been taken down, the actress and her boyfriend etched their names into a rock formation in Arizona's Coconino National Forest in the picturesque Sedona area.

The photo, shared with her 15.7 million followers, showed the giant heart with the words "Austin + Vanessa" carved into the red rock. She captioned the photo "Happy Valentine's Day boo boo bears," along with emojis of hearts, lips and roses.

The picture, which triggered the investigation, had nearly 2,000 comments and over 320,000 likes on Instagram before it was removed.

While this may seem silly and nothing more than young love, federal law specifically prohibits anyone from "damaging natural surfaces or property of the United States."

The problem for Vanessa and Austin: the rock in question is on U.S. land.

The penalty for defacing federal land is up to $5,000 in fines and/or 6 months in jail.

It's certainly not likely that either will see time behind bars, but a steep fine is very much in play.

Over the course of the couple's Valentine's week excursion, Vanessa and Austin seems to relish in the beautiful tranquility of Sedona. Vanessa posted several pictures from the scenic Arizona area, captioning many of them "#SedonaDreams."