What does a parliament, a clock tower and a giant wheel have in common? They all stand beside the River Thames as if London had carefully staged its icons for dramatic effect.

On the right, the Palace of Westminster rises as the seat of British government, rebuilt in Gothic style after the fire of 1834. Big Ben—the bell inside the Elizabeth Tower—has kept time since 1859, its chimes carrying far beyond the city. Across the river, County Hall stretches along the bank, while the London Eye offers perspective, one slow rotation at a time.

From the water, today's scene feels improbably well cast. But the Thames deserves most of the credit. Shortly after AD 43, the Romans founded Londinium here because the river was useful yet difficult to dominate. Since then, it has borne trade, rumours, power and entire worldviews. Merchants depended on it, kings navigated it, artists romanticised it. London? It grew upward, outward and across centuries—but always beside it.