No outdoor element is off bounds, with trees, benches, hills and roads all used in workouts.

BBC: Lunge with the locals in Buenos Aires

Riders are soon lost in a world of tall trees and rugged hills, with tantalising glimpses of the distant peaks of the Velebit mountains.

BBC: Croatia��s adventurous heart

The fertile alluvial plains that stretched almost endlessly outside the windows during the first half of the journey give way to an undulating red earth dotted with small rocky hills, scrub bushes and slender trees.

CNN: Center Cut

The analog classical station WETA at 90.9 FM crackles with static and dropouts caused by trees, hills and highway overpasses.

FORBES: Big Audio Dynamite

From the Colosseum, cutting across the ancient racecourse Circus Maximus, it is a wonderful stroll up the Aventino, one of Rome's seven hills, home to a dreamily upmarket residential district with deep-green trees shading its orange-ochre buildings.

BBC: A perfect day in Rome

Around him, soft green hills stretch to the horizon, descending into cool glades crowded with broad-trunked, 400-year-old oak trees.

BBC: The road to Hollywood, California