50 free Carlsbad Caverns National Park trivia questions with answers — geography quiz, new questions added Aug 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 50 questions with answers and explanations. Play the quiz
Q 01Carlsbad Caverns National Park is in which US state?
New Mexico
It sits in the Guadalupe Mountains in the state's southeastern corner, about 18 miles from the town that gives it its name.
Q 02How can visitors get down into the main cavern?
On foot or by elevator
The self-guided walk down the switchbacks takes you 750 feet below the surface.
Q 03The Big Room, the cave's main chamber, holds what distinction?
Largest of its kind in North America
It ranks 32nd largest in the world and is also called the Hall of the Giants.
Q 04Roughly how long is the Big Room?
Almost 4,000 feet
Its floor covers 357,469 square feet; it is also known as the Hall of the Giants.
Q 05Unlike most limestone caves, Carlsbad was dissolved mainly by what rising from below?
Sulfuric acid
A gas seeping up from oil deposits mixed with oxygen in the groundwater; a tell-tale mineral left in the cave is the by-product.
Q 06What gas seeped up from underlying petroleum to start the cave-making chemistry?
Hydrogen sulfide
The oil sits deep below the limestone as part of the Mid-Continent Oil Field; the reaction ran near the end of the Cenozoic.
Q 07The limestone the caverns are cut into began as what, about 250 million years ago?
A reef beside an inland sea
The Permian Capitan Reef was built by bryozoans, sponges and microbes rather than corals, then buried under evaporites and finally lifted up.
Q 08Which mineral found in the cave confirms how it was carved?
Gypsum
It forms when the acid reacts with limestone; a cave next door has 20-foot chandeliers of it.
Q 09Which formations grow down from a cave ceiling?
Stalactites
Water carrying carbon dioxide leaves a tiny calcium-carbonate deposit each time it drips; the floor-grown twins build up from below.
Q 10Which teenage cowboy explored the cavern in 1898 with a homemade wire ladder and named most of its rooms?
Jim White
He named the Big Room, King's Palace, Queen's Chamber and formations like the Totem Pole and Rock of Ages; an inscription 'J White 1898' was found deep inside in the 1980s.
Q 11What first drew the young cowboy's attention to the cave entrance?
A plume of bats he mistook for a volcano or whirlwind
He was mending fences for the Lucas ranch when he saw the swarm; he tied up his horse and found 'the biggest and blackest hole I had ever seen'.
Q 12The teenage explorer's companion on his first three-day cave trip was a 15-year-old known only by which nicknames?
Muchacho, The Kid or Pothead
They carried food, water, homemade torches and a big ball of string to find their way out; the boy's real name has never been established.
Q 13What was mined from the Bat Cave section in the early 20th century?
Q 21The Bottomless Pit got its name because stones thrown in made no sound. How deep did it turn out to be?
About 140 feet
The floor is soft dirt, which swallowed the stones silently.
Q 22How did explorers reach the Spirit World, high in the Big Room ceiling, in 1985?
They floated a cord over a stalagmite with helium balloons
A balsa loop carried the cord 255 feet up and back down; the white stalagmites inside looked like angels. A smaller room found the same way became the Balloon Ballroom.
Q 23A chamber discovered on 31 October 2013 was named what?
Halloween Hall
Bat guano
It sold for about $90 a ton to fertilise California orchards; the shaft's big iron bucket doubled as the first tourist lift.
Q 14Before a staircase was installed in 1925, how did the first tourists get into the cave?
In an iron guano bucket
The cowboy explorer lowered hundreds of visitors in the bucket; it later served as his booklet stand in the Underground Lunchroom.
Q 15Which newspaper first published Ray V. Davis's photos from inside the cavern in 1923?
The New York Times
He had begun shooting underground in 1915; that same year he and Robert Holley of the General Land Office surveyed the cave with White as guide.
Q 16Which president proclaimed Carlsbad Cave National Monument on 25 October 1923?
Calvin Coolidge
The proclamation praised a cavern 'equal, if not superior' to better-known caves; Congress made it a national park seven years later.
Q 17In which year did Carlsbad Caverns become a national park?
1930
UNESCO added it to the World Heritage list in 1995, and about two-thirds of the park is designated wilderness.
Q 18Which organisation sponsored Willis T. Lee's 1924 exploration of the caverns?
The National Geographic Society
Lee and White also built the first trails, stairs and lights between 1923 and 1927.
Q 19What did the new visitor center add in 1932 that changed how people reached the cave?
Two elevators
Until then everyone walked a switchback ramp 750 feet down and, worse, back up; the building also had a cafeteria, museum and first-aid room.
Q 20The town of Carlsbad, which lends its name to the park, is named after a spa town in which present-day country?
Czech Republic
Karlsbad, now Karlovy Vary, means 'Charles' Baths'; the local town was renamed to promote its own mineral springs.
About 100 feet across and hundreds of feet above the Spirit World, it held more than 1,000 bat bones.
Q 24The Green Lake Room was used in the early 1960s to test what?
Whether a far-off nuclear blast would ripple its pool
The military was checking if the cavern could serve as a fallout shelter; no ripples ever appeared.
Q 25The Mystery Room is named for what?
An unexplained heartbeat-like sound heard only there
It slopes off the Queen's Chamber, where the discoverer's lantern once went out and left him in the dark for half an hour.
Q 26What is the lowest known point in the cavern?
Lake of the Clouds
Its globular, cloud-like rock formed underwater when the lake was much higher; the Lake of Muddy Misery, mapped in 2018, is only 13 feet above it.
Q 27The Guadalupe Room, discovered in 1966, is famous for its dense collection of what?
Soda-straw stalactites
It is the second largest room in the cavern; the Rookery in Lower Cave is where the cave pearls are.
Q 28Roughly how many miles of Carlsbad Cavern had been surveyed by the end of the 2010s?
Almost 40
A 2018 push through a tiny passage in the Mystery Room added names like Tomb of the Sky Bears and Wriggler's Relief to the map.
Q 29How many caves does the park contain in all?
More than 119
Only three are open to the public: the main cavern plus Slaughter Canyon Cave and Spider Cave on guided 'adventure' tours.
Q 30Which park cave, opened by cavers in 1986, had over 150 miles mapped by 2020?
Lechuguilla
Cavers had heard wind roaring up through the rocks since the 1950s; access has been limited to permitted scientific expeditions.