Schlossberg

Start with the stone under your feet. It is pale grey dolomite, worn smooth by centuries of shoes and rain. It feels cool even on a warm afternoon. Somewhere above you a bell sounds the hour. Below, the red-tiled roofs of Graz spread out toward the hills. Welcome to the Schlossberg, the castle hill at the centre of Styria's capital.

The hill rises more than one hundred metres above the old town. It is a natural rock outcrop, and the city grew up around it. From the river Mur, the Schlossberg looks almost sudden. A green, steep block sits in the middle of the streets. That steepness explains most of its story. For hundreds of years, whoever held this rock held the valley below.

People built defences up here from the medieval period onward. Over the centuries, the hilltop became one of the strongest fortresses in this part of Europe. Its walls, bastions and gun platforms grew larger with each new threat. Graz sat close to the frontier with the Ottoman Empire. That border was a real danger to the Habsburg lands for generations. A fortress on a rock was not decoration. It was survival.

Here is the first surprise. The fortress was never taken by storm. Its most famous test came in 1809, during the Napoleonic Wars. French troops besieged the hill. A small garrison under Major Franz Hackher held out. The defenders only gave up the fortress because of a peace treaty signed far away. Today a lion monument to Hackher stands on the hill, so look for it as you explore.

After that peace, the French ordered the fortress destroyed. Most of the walls and buildings were blown up and pulled down. But the people of Graz did something unusual. They paid a ransom to save two buildings they loved: the Clock Tower and the Bell Tower. That money is the reason the city still has its best-known silhouette. Without it, this hill would look very different.

The Clock Tower, or Uhrturm, sits on the southern edge of the hill. It has a white body, a wooden gallery and a dark roof. Its current shape dates back to the sixteenth century. Now look closely at its four clock faces. Something feels wrong... and it is. The long hand shows the hours. The short hand shows the minutes. For a long time the clock had only an hour hand, so it was made large to read from far away. The minute hand came later and was given the smaller size.

On the other side of the plateau stands the Bell Tower, an octagonal tower with thick walls. Inside hangs one of the heaviest bells in Graz, which locals call the Liesl. It rings regularly through the day. According to a popular local tale, the bell was cast from cannonballs left behind by Ottoman armies. That story is folklore rather than documented history. Still, it shows how closely this hill is tied to the memory of the old frontier.

After the fortress was demolished, the hill had a new role. In the nineteenth century, the people of Graz turned the ruins into a public park. They planted trees, laid out paths and built terraces with views. You can still feel that change today. The old gun positions are now quiet benches. Former military ground is now a place for slow walks, coffee and picnics.

There are several ways to reach the top, and each is part of the experience. A funicular railway has climbed the slope since the late nineteenth century. Its cabins run on a steep track through the trees. There is also a modern glass lift that rises through a shaft cut into the rock. And then there are the stairs. The zigzag steps on the river side were cut into the cliff during the First World War, partly with the labour of prisoners of war.

Here is the second surprise. The Schlossberg is hollow in many places. Long tunnels run through the rock. During the Second World War, they served as air raid shelters. Thousands of residents sheltered inside the hill during bombing raids. Today some of these spaces have new uses. One large hall in the rock hosts events and exhibitions. And from the top, you can now ride a long underground slide that spirals down through the mountain to the street below.

On the plateau, look for the Kasematten. These are the remains of old fortress cellars. Now they hold an open-air stage for concerts and theatre in summer. Nearby is a deep old well, dug straight down into the rock. A fortress under siege needed water, and this well was its answer. Lean over the railing, and you can sense how far down it goes. Keep an eye out, too, for a small Chinese-style pavilion among the trees. It is a quiet relic of the park years.

Now turn toward the view. Below you lies the old town of Graz, which is listed as a UNESCO World Heritage Site. Notice the sea of red and brown roofs, the church towers and the green line of the Mur. On the far bank, you may spot a modern building with a curving blue skin. Locals call it the friendly alien. It is the Kunsthaus, the city's contemporary art museum. Old and new sit side by side in one frame.

Take a moment before you leave. Feel the breeze that moves across the top of the hill. Listen for the bells, the traffic far below, and the voices of people on the paths. When you walk back down, look up at the Clock Tower once more. Check those reversed hands against your own watch. And remember that this tower still stands because ordinary citizens chose to pay to keep it.