The London City Tower, also known as the London Vertical City, is a proposed Supertall Skyscraper design announced on 25 August 2008. The supertall, created by an architect to display possibly future technologies, is the third tallest building ever fully envisioned after the X-Seed 4000 (4000m) and the Ultima Tower (3217m). If ever constructed, the London City Tower will be much taller than any other current man-made structure, at almost three times the height of the Burj Khalifa. The London City Tower would be almost seven times taller than the Empire State Building. The design has 400 floors with a 200 km/h (125 mph) vertical bullet train acting as the main elevator. The design is inspired by the Eiffel Tower to better deal with the massive wind forces pushing on it. It has a central core with 6 outer buildings that are connected to the central core every 100 floors. This design both stabilizes the structure and spreads out its mass.

The London City Tower is estimated to consume 37,000 MWh of electricity per year, with a 15 MW peak usage. The power will be mostly supplied by solar, thermal, and wind sources. If this place was built today (and not in the future) and if humans are gone, The London City Tower consumes no electricity.

Life After People

10 Years after People: The glass of the building began to fall down making the building like a downward fountain made of glass coming off.

50 Years after People: After the collapse of the Thames Barrier, the 6 outer buildings of the London City Tower is next. One tower collapses on the next which collapses on to the next like a Domino Rally causing to to form a huge dust cloud which triggers to collapse of more skyscrapers in London, collapsing two thirds of the core. The skyscraper remains as tall as the Burj Khalifa.

75 Years after People: An earthquake measuring 9.3 hits London. The tower will be built to survive earthquakes, but after 75 years without being maintained, it can't fend off Mother Nature. One of the legs fails. The rest of the core follows. The whole tower collapses onto the Pride of the 2012 London Olympics and Paralympics. Only 2 of the legs remain. But an aftershock shakes them down.