Shape of Cities by Yoni Alter

Shape of your Cities it's a project from Yoni Alter which select the most famous buildings in cities like London, Barcelona, Chicago, Tokyo, New York ... vectorizes and turn them into colorful layers that overlap one another, showing the skyline of cities with height proportional occupied by modern buildings, monstrous and sometimes more modest height of buildings and ancient monuments.

London: The Shard, The Gherkin, BT Tower, London Eye, Battersea Power Station, Tower Bridge, Big Ben, Nelson's Column and The New Bus for London. 

NYC: Empire State Building, Statue of Liberty, Washington Sq. arch, Guggenheim Museum, Bank of America Tower, One WTC, Three WTC, Conde Nast Building, NY Life Building, Chrysler Building. 

Paris: Tour Montparnasse, Eiffel Tower, Arc de Triomphe, Grande Arche, Louvre Pyramid, July Column, Notre Dame de Paris, Basilica of the Sacré Cœur.

Barcelona: Magic Fountain of Montjuïc, W Barcelona (Hotel Vela), Torre de telecomunicaciones de Montjuïc, Columbus Monument, Torre Agbar , Arc de Triomf.

The source is El Tornillo que te Falta.