London Eye

Listen for a moment. Under the traffic noise on the South Bank there is a soft, steady hum. It comes from the wheel above you. It never quite stops. The river slaps against the embankment wall, gulls cry over the water, and a street performer is probably drawing a crowd nearby. Look up. A ring of white steel rises over the Thames, and glass capsules move along its rim so slowly that, at first, they seem to stand still.

This is the London Eye. It was built to mark the arrival of the year 2000, and many Londoners first knew it as the Millennium Wheel. It stands on the South Bank, the south side of the river, almost opposite the Houses of Parliament. The wheel rises about 135 metres. When it opened, it was the tallest observation wheel in the world. Today taller wheels exist elsewhere, but this one still sets the shape of the London skyline.

Here is the first surprise. The wheel was not designed by a large engineering firm. It began as an idea from a married pair of architects, David Marks and Julia Barfield. They entered a competition for a millennium landmark. Their wheel did not win. No winner was ever built, so the couple kept working on the idea themselves. They spent years finding backers, permissions and engineers. The structure you see came from that persistence.

Now look at how the wheel stands. Most big wheels have legs on both sides, like a bicycle wheel held in a fork. This one does not. A huge A-shaped frame leans in from one side only, on the land, and holds the wheel out over the water. Thick cables pull the frame back and keep it steady. Engineers call this a cantilever, a structure supported at one end. That is why the wheel seems to float above the river.

The way it was built is just as unusual. The wheel was not built upright. Workers assembled it lying flat, on temporary platforms over the Thames. Parts arrived from several countries across Europe, many of them brought up the river. In 1999, cranes slowly raised the finished rim from flat to upright. The lift happened in stages over several days. Londoners gathered on the bridges to watch it rise.

The opening did not go smoothly. The wheel had a ceremonial launch on the last night of 1999, as the city celebrated the new millennium. But a technical problem with the capsules delayed passengers. The public took their first rides in early 2000. For a short time, London had a new landmark that nobody could ride. Today that story is mostly forgotten.

Count the capsules if you can. There are thirty-two, one for each of London's thirty-two boroughs, the local districts that make up the city. Here is the second surprise. The numbers run up to thirty-three, because there is no capsule thirteen. The number is skipped for luck, as in many hotels and lifts. Each capsule is a closed glass pod. It is large enough for a group of people to walk around inside.

One more detail shapes the whole ride. The capsules do not hang below the rim like seats on a fairground wheel. They are fixed to the outside of the rim. Small motors turn each capsule as the wheel moves, so the floor always stays level. This also means nothing blocks your view. The steel structure sits behind and beside you, never in front.

The pace is slow on purpose. One full turn takes about half an hour. The wheel usually does not stop for boarding. It moves so slowly that people step on and off while the capsules keep moving, at about walking pace. Staff stop it for passengers who need more time. Watch the boarding platform for a minute. You will see how calm the process looks.

From the top, the city spreads out like a map. To the west are the Houses of Parliament and the clock tower people call Big Ben. The real Big Ben is the great bell inside. To the east, the river bends toward the towers of the City of London. On a clear day, you can see far past the edge of the city. On grey days, the clouds can feel close enough to touch.

The wheel was never meant to stay. Its first planning permission was temporary, for only a few years. But Londoners quickly grew used to it. Visitors came in large numbers, and the city decided to keep it. Something built as a short celebration became a permanent part of the riverside. Many people now find it hard to picture the South Bank without it.

The wheel also plays a part in the city's year. On New Year's Eve, London's great fireworks display centres on the wheel and the river around it. Crowds fill the embankments on both sides of the Thames. At other times, the rim lights up in different colours to mark national events, sports victories or charity causes. If you come back after dark, the wheel may look completely different.

Before you move on, stay here for one more minute. Notice the capsules moving along the rim. Each one is slow, patient and nearly silent. Behind you, the old stone of County Hall faces the river. Across the water, Parliament stands in its pale stone. As you walk away along the embankment, look back once. From a distance, the wheel looks light and thin, like a drawing on the sky.