Carlsbad Caverns National Park Trivia
0Loading crowd target
0Loading crowd target
6correct to beat the crowd
48 free Carlsbad Caverns National Park trivia questions with answers — geography quiz, new questions added Oct 2026.
This Carlsbad Caverns National Park trivia quiz covers the great show cave in the Guadalupe Mountains of southeastern New Mexico and the more than 119 other caves in the park around it. Questions cover the geology (a Permian reef, hydrogen sulfide from oil fields, sulfuric acid eating limestone from below), the Big Room and the named chambers, the speleothems, and the pristine Lechuguilla Cave with its gypsum chandeliers and ancient antibiotic-resistant bacteria. The human story centres on Jim White, the teenage cowboy who followed a 'whirlwind' of bats to the entrance in 1898 and spent decades exploring, naming and promoting the cave, plus the guano miners, the photographer whose pictures made the New York Times, Coolidge's 1923 monument, the 1930 park, the 1932 elevators, the Cold War fallout-shelter test and the balloon-borne discovery of the Spirit World. Bats get their due too: the Mexican free-tailed colony, the evening flight and the thermal-camera counts. Questions run from easy to expert with the difficulty shown on each one. Every answer was checked against a reference page and each question carries its citation. If you enjoy this one, try our Big Bend and US National Parks quizzes next.
30 of 48 questions with answers and explanations. Play the quiz
Q 01Carlsbad Caverns National Park is in which US state?
New Mexico
New Mexico: the park lies in the state's far southeast, while California's beach city of Carlsbad shares the name only because both towns borrowed it from the same famous European spa.
Q 02How can visitors get down into Carlsbad Cavern's Big Room?
On foot or by elevator
On foot or by elevator: hikers take the steep 1.25-mile Natural Entrance Trail, and until an elevator shaft was blasted through the rock in the early 1930s, every visitor also had to climb back out.
Q 03In 1952, photographer Tex Helm lit Carlsbad Cavern's Big Room for one shot with 2,400 of what?
Flashbulbs
Flashbulbs: Helm set them in reflectors all around the chamber and fired them together in a single instant, a split-second blaze bright enough to photograph the great room in full colour.
Q 04Which 1930s humorist wrote that Carlsbad Caverns is "just the Grand Canyon with a roof over it"?
Will Rogers
Will Rogers wired the line to his newspaper readers after walking the cave, adding that inside it had "all the cathedrals of the world in it, with half of 'em hanging upside down".
Q 05Unlike most limestone caves, Carlsbad was dissolved mainly by what rising from below?
Sulfuric acid
Sulfuric acid: a sulfur-bearing gas rising from deep oil deposits met oxygen in the groundwater and formed sulfuric acid, which dissolved the limestone from below rather than from rainwater above.
Q 06Which snack gives its name to the knobbly mineral clusters that stud Carlsbad Cavern's walls?
Popcorn
Popcorn: cave popcorn sometimes coats only one side of a formation, the side that faced the moving air, so it shows geologists which way the cavern's breezes once blew.
Q 07The limestone of Carlsbad Cavern formed about 250 million years ago from what?
A reef beside an inland sea
A reef beside an inland sea: sponges and algae built the Capitan Reef, which was buried after the sea dried up and much later heaved up as a desert mountain range.
Q 08Which soft white mineral, also the sand of White Sands National Park, confirms that acid carved Carlsbad Cavern?
Gypsum
Gypsum: when the acid that carved the cave attacked limestone it left gypsum behind; thick gypsum blocks lie on the Big Room floor, and a neighbouring park cave holds 20-foot gypsum chandeliers.
Q 09Which formations grow down from a cave ceiling?
Stalactites
Stalactites: each drip of water carrying dissolved calcium carbonate leaves a trace on the ceiling, so stalactites lengthen downward while stalagmites build up from the floor beneath them.
Q 10Which cowboy, still in his teens, explored Carlsbad Cavern around 1900 by homemade wire ladder?
Jim White
Jim White went on to guide the cave's first tourists and, in 1923, the government surveyor whose report won it national monument status.
Q 11The cowboy who explored Carlsbad Cavern said he first took its swirling evening bats for what?
A volcano
A volcano was his first guess, by his own much-told account: he watched the dark column for half an hour, then pushed through the brush to "the biggest and blackest hole I had ever seen".
Q 12Which photographer shot Carlsbad Caverns in the early 1940s for murals planned for the Interior Department?
Ansel Adams
Ansel Adams photographed the cave for the Interior Department's Mural Project, but the war ended the scheme in 1942 and the wall-sized prints were never made.
Q 13Before a staircase was installed in 1925, how did the first tourists get into Carlsbad Cavern?
In an iron guano bucket
Q 21What did cavers use in 1985 to get a rope up to the Spirit World, in the ceiling of Carlsbad's Big Room?
Helium balloons
Helium balloons carried a light cord, looped on balsa wood, over a stalagmite some 250 feet up; a climbing rope was hauled after it, and the first explorer went up into a room nobody had seen.
Q 22A chamber discovered high in Carlsbad Cavern on 31 October 2013 was named what?
Halloween Hall
Halloween Hall: two cavers finishing a survey above the Spirit World climbed one more unexplored ledge that night and found a colourful chamber littered with thousands of bat bones.
Q 23Whatever the desert heat above, what do rangers advise wearing inside Carlsbad Cavern?
A light jacket
In an iron guano bucket: before the 1925 stairway, the cowboy explorer winched early sightseers down the old mining shaft in the big iron bucket that had hauled up bat droppings.
Q 14Which newspaper published Ray V. Davis's photographs from inside Carlsbad Cavern in 1923?
The New York Times
The New York Times ran the pictures in 1923; Davis had been taking the first photographs inside the cave since 1915, and they did much to stir interest in it.
Q 15Which president proclaimed Carlsbad Cave National Monument on 25 October 1923?
Calvin Coolidge
Calvin Coolidge signed the proclamation six months after Robert Holley, a government surveyor sent to map the cave, came out so impressed that he urged monument status.
Q 16In 1930, what turned Carlsbad Cave National Monument into Carlsbad Caverns National Park?
An act of Congress
An act of Congress: a president can proclaim a national monument alone, as one had for this cave in 1923, but a national park can be created only by Congress.
Q 17Which organisation sponsored Willis T. Lee's 1924 exploration of Carlsbad Cavern?
The National Geographic Society
The National Geographic Society printed Lee's first account of the cave in January 1924, then paid for his six-month return that spring; his "New Discoveries in Carlsbad Cavern" followed in 1925.
Q 18In 2024, Carlsbad rangers warned that a dropped bag of which snack had a "world changing" effect on cave life?
Cheetos
Cheetos: the processed corn softened in the humid air and fed mold, then crickets, mites, spiders and flies, one reason only plain water is allowed in the cavern.
Q 19The town of Carlsbad took the German name of a famous spa town now in which country?
Czechia
Czechia: Karlsbad, "Charles's Baths", is now Karlovy Vary in the Czech Republic, and the townsfolk voted to borrow its name in 1899 because mineral springs nearby were said to match the spa's waters.
Q 20On old ranger-led tours of Carlsbad Cavern, the lights went out while four rangers sang which hymn?
Rock of Ages
Rock of Ages: tours gathered at the giant stalagmite of that name, the cavern went black and a quartet of rangers sang; the park recalls the custom on its December lantern tours.
A light jacket: the cavern holds at about 56°F and humid all year, so even in a desert summer visitors walk down into jacket weather.
Q 24Which amenity awaits visitors deep underground at the edge of Carlsbad Cavern's Big Room?
A lunchroom
A lunchroom: the Park Service has drawn up plans to take the Underground Lunchroom out of the cave, but spending bills have repeatedly barred any contract that would remove it.
Q 25What do cavers call the pencil-thin formations that crowd the ceiling of Carlsbad Cavern's second-largest room?
Soda straws
Soda straws: each drip leaves a ring of calcite, building a hollow tube of even width; if the tip plugs, water runs down the outside and the straw thickens into a full-sized formation.
Q 26Which New Deal programme kept a work camp at Carlsbad Caverns National Park from 1938 to 1942?
Civilian Conservation Corps
Civilian Conservation Corps: its recruits put up adobe staff housing near the cave entrance in 1940-42, buildings that now form part of the park's historic district.
Q 27What has been banned at Carlsbad Caverns' evening bat flight since 2006, to avoid disturbing the bats?
Cameras
Cameras: flash photos kept being taken despite a no-flash rule, so the superintendent banned cameras outright; the ban now covers phones and every other electronic device.
Q 28Which Carlsbad Caverns National Park cave, broken into by cavers in 1986, had over 150 miles mapped by 2020?
Lechuguilla
Lechuguilla: cavers who had heard wind roaring up through rubble since the 1950s broke into it in 1986, and its surveyed passages passed 150 miles by 2020, making it one of the world's longest caves.
Q 29A Carlsbad Caverns National Park cave famed for 20-foot crystal chandeliers featured in which BBC series?
Planet Earth
Planet Earth: its 2006 "Caves" episode filmed the Chandelier Ballroom, in a cave so fragile and tightly restricted that few people other than scientists and survey teams are ever let in.
Q 30Bacteria sealed inside a remote Carlsbad Caverns National Park cave gave scientists evidence of what?
Antibiotic resistance is ancient
Antibiotic resistance is ancient: microbes cut off from the surface for some four million years had never met a modern drug, yet some shrugged off a dozen or more, so resistance long predates medicine.