Ideal for long walks? You´ve just found it! The river promenade starts under the Lafranconi bridge, proceeds next to Danube river up to historical center.
It´s almost designed for long walks, but if you rather enjoy activities, you can ride your bicycle on the cycle-path or...
Small park directly next to the Tower Bridge.
You can relax in the park, or just by the riverside, only a couple of meters from the London's famous Tower Bridge. Later you can nicely proceed onto other famous historical sights like Palace of Westminster or London Eye.