How big is Carlsbad Caverns in New Mexico?

* Area: 46,766 acres (190 km2)

* Length of caves: Over 100 miles (160 km)

* Depth of caves: Over 1,000 feet (300 m)

* Volume of caves: Over 2 cubic miles (8 km3)

* Number of chambers: Over 100

* Largest chamber: The Big Room, which is 4,000 feet (1,200 m) long, 625 feet (190 m) wide, and 255 feet (78 m) high.