Happy and Healthy Bike Lane

Technically, this one sits just outside Bangkok proper, but no serious list of riding spots near the city leaves it out. The Happy and Healthy Bike Lane, formerly Sky Lane and before that Green Lane, is a 23.5km circuit that loops the perimeter of Suvarnabhumi Airport on purpose-built rubberised asphalt. 

It was named one of the world's best airport bike paths by CNN when it opened, and the infrastructure has only improved since: cashless payment via wristband, bike rentals on-site, food and water stops every 5km, a rescue van, helmets included and a well-maintained surface throughout. You ride past irrigation canals, open farmland and a constant stream of planes banking overhead, which sounds gimmicky but is genuinely fun. Registration requires ID (passport for non-Thais) and a SNAP wristband deposit. One loop is plenty; the more committed come back for three.

Difficulty: Easy to Moderate (flat, 23.5km)
Best time: Early morning or early evening; avoid midday heat
What makes it unique: A purpose-built airport perimeter circuit that is car-free, well-equipped and unlike anything else in the region

Happy and Healthy Bike Lane, 999/1 Suvarnabhumi 4 Rd, Nong Prue, Bang Phli, Samut Prakan. Open daily.