Burren National Park

Listen for a moment. There is wind, a lark somewhere overhead, and very little else. Under your boots the ground is grey stone, cracked into slabs like an old pavement. Rainwater runs in small channels on its surface, and between the cracks there is a sudden flash of colour. A tiny blue flower. A fern. A tuft of thyme. This is Burren National Park, in the south-east corner of the Burren in County Clare, and the stone is everywhere you look.

The name comes from the Irish word Boireann, usually translated as a rocky place. That is an honest description. Across this part of north Clare, the soil is thin or missing entirely, and the bones of the land lie open to the sky. The national park is the smallest of Ireland's six, but it holds almost every kind of Burren landscape in one compact area: bare limestone, hazel scrub, ash woodland, grassland, lakes, and the strange folded hill called Mullaghmore.

Start with the stone itself, because everything here depends on it. This limestone formed on the floor of a warm, shallow sea more than three hundred million years ago. Look closely at a weathered slab and you may find small round discs or broken stems pressed into the rock. These are fossils. Many are crinoids, sea creatures related to starfish, which looked a little like plants on long stalks. You are standing on the remains of an ancient seabed, now lifted high above the Atlantic.

Then came the ice. During the last Ice Age, glaciers moved across this region and scraped much of the surface clean. When the ice melted, it left boulders scattered across the pavement. Geologists call these erratics — stones carried from elsewhere and dropped where they did not belong. Over thousands of years, rain dissolved the limestone along its natural joints. That process created the pattern you see underfoot: flat blocks called clints, separated by deep cracks called grikes.

Those grikes are the secret of the Burren's flowers. Down inside them, out of the wind, the air stays damp and sheltered. Ferns and woodland plants grow there, in tiny gardens below the surface. Kneel beside one and look down. The temperature feels different. The light turns green. Many visitors walk straight past without realising that half the life of this landscape is hidden at knee height, inside the rock.

Here is the surprise that brings botanists from around the world. In the Burren, plants from very different climates grow side by side. Arctic and alpine species, which normally live on high mountains or far to the north, grow here close to the sea. Beside them grow plants usually found around the Mediterranean. The spring gentian, a small flower of intense blue, is the one people most want to see. Mountain avens, with white petals and a yellow centre, is another. Orchids appear in their season too.

Why does this mix work? Nobody claims a single answer, but several things help. The Atlantic keeps winters mild, so frost rarely lasts long. The bare stone soaks up heat by day and releases it slowly. The thin soils are low in nutrients, so vigorous grasses cannot crowd out smaller plants. And grazing animals keep the grassland short. The result is a place where a careful walker can find dozens of different flowers within a few steps.

That grazing is part of an old farming tradition called winterage. In most of Europe, farmers moved cattle up to the hills in summer. In the Burren, many did the reverse. They brought cattle up onto the limestone uplands for the winter, where the stone holds warmth and the ground drains quickly. The animals eat the coarse grass and scrub. In spring they come back down. Many ecologists credit this rhythm with keeping the flower meadows open, and local communities still celebrate it each autumn.

Now turn your attention to Mullaghmore. It is the hill whose layers of grey rock curve and swirl like a stack of folded blankets. The folds formed when huge forces in the earth bent the limestone beds. Erosion then exposed them as long terraces. In soft evening light, each terrace casts its own shadow, and the hill looks almost drawn by hand. For many people, this is the image of the Burren they carry home.

Mullaghmore also has a modern story. In the 1990s, a plan to build a visitor centre near the hill led to a long public dispute. Campaigners argued that new buildings would damage the place they were meant to celebrate. The case went through the courts, and in the end the centre was not built here. Today the park has no large visitor building inside it. Information is offered in the nearby village of Corofin, and the land itself is left to speak plainly.

As you walk, watch the low ground. Some of the lakes and wet hollows here are turloughs, a word from the Irish for a dry lake. They fill in wet seasons and then drain away through the limestone, sometimes almost overnight, because the water sinks into channels below. A field that looks like a meadow in summer can be a shining lake in winter. Around them, look for butterflies on warm days, and for the shaggy wild goats that browse among the hazel.

There is one well-known line about this landscape. It is attributed to an officer in Cromwell's army in the seventeenth century, who reportedly complained that the Burren had not enough water to drown a man, wood to hang him, or earth to bury him. He meant it as an insult. Standing here now, it reads more like a portrait. The scarcity he saw is exactly what allows this delicate, crowded life to survive.

Before you move on, stand still once more. Feel how the stone under your feet is cool on the surface but carries the day's warmth. Look down into the nearest grike, and then up at the terraces of Mullaghmore. Notice the quiet, the slow clouds, the grey turning silver in the light. Walk gently on the way back, and stay on the path where you can. The flowers here are small... and every one of them took a long time to grow.