London is in the midst of an unprecedented architectural boom, with around 510 tall towers — those with more than 20 stories — planned or under construction in the next decade.

Much of this development will take place in the next two years.

As new buildings spring up along the waterfront, residents are bracing for the sudden transformation of their neighborhoods.

Forthcoming structures include a 26-story high-rise with a rock-climbing window and a mixed-used development with the world's first "floating" swimming pool.

Here are nine of the most stunning skyscrapers that will transform the London skyline by 2020.