Carlsbad Caverns National Park

Carlsbad Caverns is one of those places that rearranges your sense of scale. Beneath the sun-bleached hills of southeastern New Mexico lies a labyrinth of more than a hundred limestone caves, dissolved out of an ancient reef over millions of years by sulphuric acid rather than the gentle drip-water most caves are formed by. The result is decoration on a monstrous scale.

The Big Room and the bats

The centrepiece is the Big Room, a single chamber so vast it could swallow several football pitches, hung with stalactites, draped in flowstone and studded with formations that look like frozen waterfalls and melted cathedrals. You reach it either by a switchbacking walk down through the Natural Entrance or, more gently, by a lift that drops you the height of a tall building in under a minute.

Above ground, the park protects Chihuahuan Desert wildness, but its most famous residents are the hundreds of thousands of Brazilian free-tailed bats that spiral out of the cave mouth at dusk in summer. For a family from the UK, where caves are modest affairs, this is a genuinely otherworldly day out.

You descend into Carlsbad Caverns and the ordinary world simply switches off. The air turns cool and still, the light goes soft and amber, and the only sound is your own footsteps and the occasional drip echoing somewhere in the dark. Teenagers who arrive scrolling on their phones lose signal and, quietly, lose their cool detachment too. The Big Room is the kind of space that makes everyone speak in whispers without being told to.

Then there is the bat flight: a summer evening ritual where a ranger talks, the sky dims, and suddenly the cave exhales a living, swirling ribbon of hundreds of thousands of bats climbing into the dusk. It is strange, primal and completely unlike anything you can see at home. Carlsbad rewards curiosity with genuine wonder.

Carlsbad is a compact park by American standards, and everything a visitor needs sits along a single scenic road up to the visitor centre, where the cave is accessed. You will drive yourself; there is no park shuttle. From the visitor centre the caverns are explored entirely on foot, either via the lift or the Natural Entrance trail. The above-ground Walnut Canyon Desert Drive is an unpaved loop suitable for ordinary cars in dry conditions and worth an hour for the desert scenery and wildlife. Distances within the park are short, but the surrounding region is vast and empty, so fill up on fuel in Carlsbad town and carry water. There are no seasonal road closures of note, though desert storms can occasionally affect the unpaved drive.

There is effectively no public transport to or within Carlsbad Caverns. No scheduled buses or trains serve the park, and rideshare coverage in this remote corner of New Mexico is thin and unreliable. For a family of five, a hire car collected at El Paso or Carlsbad is essential; it gives you the flexibility to reach the park, return for the evening bat flight and explore the wider desert region at your own pace. Factor the car into your budget from the outset, as it is not an optional extra here but the only realistic way to visit.

• Walk in via the Natural Entrance for the full experience, then take the lift back up when legs tire; it is a steep 1.25-mile descent.
• Bring a light jacket even in high summer, as the cave stays cool and damp year-round, around the low 50s Fahrenheit.
• Timed-entry reservations are often required and book up; secure yours online before you travel.
• The bat flight programme runs roughly late spring through October, and timing shifts with sunset; check the day's schedule at the visitor centre.
• No phones, cameras or torches are allowed at the bat flight, as they disturb the colony.
• Wear grippy shoes; the paved trail is smooth but can be slick with condensation.
• The onsite dining is limited, so pack water and snacks, especially in desert heat.

Above ground this is Chihuahuan Desert country: hot, dry summers with daytime highs often into the 90s Fahrenheit, and mild, cool winters with chilly nights. Rain is scarce but comes in sudden late-summer thunderstorms. Inside the cave, however, the temperature barely moves from the low 50s Fahrenheit all year, with high humidity. Pack for two climates in one day: sun hat, sunscreen and plenty of water for the surface, plus a warm layer and sturdy, non-slip shoes for the cool, damp cave below. Spring and autumn are the most comfortable seasons to explore both.

The most practical gateway from the UK is El Paso International Airport (ELP), reached via a connection through a major US hub such as Dallas or Houston, then roughly a 2.5-hour drive southeast to the park. Midland International (MAF) is another option but generally a longer drive. There is no direct transatlantic service, so budget for at least one connection and a day of travel each way. Hire a car at the airport; this is remote desert country and you will need one. The nearest town, Carlsbad, sits about 30 minutes from the cave entrance and makes a sensible base for a family, with a cluster of hotels, supermarkets and places to eat before the final drive up to the park.