Here's why:

* Location: Carlsbad Caverns is located in New Mexico, USA, within the interior of the North American Plate.

* Plate Boundaries: Tectonic plate boundaries are where plates interact, causing phenomena like earthquakes, volcanoes, and mountain formation. Carlsbad Caverns is far from any active plate boundary.

* Formation: The caverns were formed by the dissolution of Permian-age limestone by acidic groundwater. This process, known as karst formation, is not directly related to tectonic activity.

While Carlsbad Caverns isn't directly on a plate boundary, the region has experienced some tectonic activity in the past. The uplift and folding of the Permian Basin, where the caverns are located, was influenced by tectonic forces. However, the caverns themselves formed due to geological processes unrelated to plate boundaries.