What large national park features ancient fossil specimens in New Mexico?

The large national park that features ancient fossil specimens in New Mexico is Badlands National Park. This park is known for its striking geological formations and rich fossil beds that date back millions of years, providing significant insights into prehistoric life. While other options present notable characteristics and unique geological features, they do not specialize in fossil specimens like Badlands National Park does.

For context, Carlsbad Caverns National Park is famed for its impressive cave systems and stunning limestone formations but is more notable for its cave formations rather than fossils. White Sands National Park is recognized for its vast gypsum sand dunes, which create a unique landscape but do not contain significant fossil remains. Bandelier National Monument, while known for its ancient Pueblo dwellings and petroglyphs, is primarily focused on archaeological sites rather than fossil evidence. In contrast, Badlands National Park stands out for its extensive fossil deposits, making it the correct answer.