A hiker on a trail leading to Conical Hill on the Routeburn Track, part of Fiordland National Park, South Island, New Zealand, Pacific

Chocolate Hills, conical hills in tropical limestone karst, Carmen, Bohol, Philippines, Southeast Asia, Asia

Chocolate Hills, conical hills in tropical limestone karst, Carmen, Bohol, Philippines, Southeast Asia, Asia

The colourful hills of the Painted Hills unit in the John Day Fossil Beds National Monument, Oregon, United States of America, North America

Thorpe Cloud, a conical hill with hawthorns in blossom and barn, Dovedale, Peak District, Derbyshire Staffordshire border, England, United Kingdom, Europe

The colourful hills of the Painted Hills unit in the John Day Fossil Beds National Monument, Oregon, United States of America, North America

The colourful hills of the Painted Hills unit in the John Day Fossil Beds National Monument, Oregon, United States of America, North America

Row of old windmills on Pitiki Hill below Panteli castle, Platanos, Leros, Dodecanese Islands, Greek Islands, Greece, Europe

Conical limestone hills and Shanghai to Kunming Railway, Guilin, Shuicheng, Guizhou, China, Asia

Beautiful Trulli of Alberobello, Italy.