Raised stones for pedestrians to avoid waste water running through street in the ruins of the Roman site of Pompeii, UNESCO World Heritage Site, Campania, Italy, Europe

A raised path in the Borrowdale Valley with Castle Crag the prominent hill in the centre of image, Lake District National Park, UNESCO World Heritage Site, Cumbria, England, United Kingdom, Europe

Serious woman stretching arm on forest path

Sunbeams on mixed race woman dancing in city

Mixed race woman dancing ballet in city

Mixed race ballet dancer on sidewalk

Mixed race ballet dancer on sidewalk in city

Black woman stretching on track starting line

Mixed race ballet dancer wearing dress on sidewalk

Mixed Race woman stretching with leg raised

Mixed race woman dancing ballet in city

Mixed Race sisters having fun posing on forest path

Black woman stretching on track

Mixed race woman balancing on arm at waterfront

Mixed Race woman stretching on running path in park

Frozen boardwalk leading to the visitor information centre in wintertime, Hautes Fagnes ("High Fens") uplands, Liege, Belgium, Europe

Small circular lake with reflected trees and raised hide between meadows and a beautiful sunset, Adelschlag, Bavaria, Germany, Europe

Frozen boardwalk leading to the visitor information centre in wintertime, Hautes Fagnes ("High Fens") uplands, Liege, Belgium, Europe

Boardwalk in the Naturschutzgebiet Dosenmoor nature reserve, regenerating and partially preserved bog, Kreis Neumuenster county, Schleswig-Holstein, Germany, Europe

Boardwalk in the Naturschutzgebiet Dosenmoor nature reserve, regenerating and partially preserved bog, Kreis Neumuenster county, Schleswig-Holstein, Germany, Europe

Frozen boardwalk leading to the visitor information centre in wintertime, Hautes Fagnes ("High Fens") uplands, Liege, Belgium, Europe

Frozen boardwalk leading to the visitor information centre in wintertime, Hautes Fagnes ("High Fens") uplands, Liege, Belgium, Europe

Bobcat (Lynx rufus) with front paw raised walks along a path at Sweetwater Wetlands; Tucson, Arizona, United States of America

A male leopard, Panthera pardus, walks down a sand path, front paw raised, looking out of frame, green background, Londolozi Game Reserve, Kruger National Park, Sabi Sands, South Africa

Young women with arms raised in forest, USA, Oregon, Portland