Around half a million bikes are sold in Denmark each year, and nine out of ten Danes own one. It's the ideal location for high-tech smart bike-sharing scheme Gobike to debut. But what will it mean for locals? And can it provide an effective solution to travel in other cities?

Whether its a hipster on their fixie, a banker on their Brompton or MAMIL (middle-aged man in lycra) on their road bike, city streets and country lanes in the UK are packed with cyclists. Around two million Brits now cycle at least once a week. What is making travelling by two wheels so popular?

Since the first bike path was built in Brooklyn in 1894, over 200,000 New Yorkers cycle the streets every day. But this green and healthy shift has run into difficulties, so cyclists are crowdsourcing a map of cycling issues and hazard warnings to promote bike safety.

It was the early '80s when Copenhagen first set out to become a haven for cyclists, and in the decades since more than 200 miles of cycle lane have been built in the city. The latest addition – named the Cykelslangen – adds just 721 feet, but it's one of the most exciting.