The National Park Sign is a sign that appeared in Mount Snow in 2017. The text says "[insert PBS station] welcomes you to Kart Kingdom".

It's appearance in Mount Snow replaced the Craft It Booth in the same location.

It is a popular landmark.

Sometimes, it does not have (station) welcomes you.

In terms of game files, the station plaque is a seperate item from the sign, although it normally appears on the top left corner of the sign in the game.