Hangzhou in a browser, built in 24 minutes

Twenty-four minutes. That is the number SuSu puts next to a whole city.

Hangzhou, in a browser: West Lake, Leifeng Pagoda, Qianjiang New Town, the "Big Lotus" stadium, the Longjing tea hills, Xixi wetland — and then out past the city, to Fuyang, Tonglu and Shaoxing. Drag to rotate, scroll to zoom, click a landmark to fly to it, switch between day, sunset and night, or let it tour on its own.

The list is the argument. A skyline demo can fake one waterfront; it cannot fake the region around it. And the small things are there too — furrows in the tea fields, boats on the water, cars on the bridges. It is an interactive miniature, not a still image, and the author's challenge to locals is the right test: how many places can you recognise?