Estimates of the numbers of people who partake each week vary from one million to two million, and the city fills with mountain bikes, road bikes, fold-up bicycles and children on training bikes.

BBC: Reclaiming the streets in Bogota

Bicycles come in many different forms: racing, mountain, touring, hybrid, track, utility, cruiser, fixed-wheel, dirt-jumper, porteur, BMX.

ECONOMIST: How Robert Penn found himself the perfect two-wheeler