Aurora borealis (Northern lights) and winter camping on Kungsleden (The Kings Trail) hiking trail, Abisko National Park, Sweden, Scandinavia, Europe

Aurora borealis (Northern lights) and winter camping on Kungsleden (The Kings Trail) hiking trail, Abisko National Park, Sweden, Scandinavia, Europe

Hiker on Kungsleden (The Kings Trail) hiking trail, Abisko National Park, Sweden, Scandinavia, Europe

Ski touring on Kungsleden (The Kings Trail) frozen lake, Abisko National Park, Sweden, Scandinavia, Europe

Aurora borealis (Northern Lights) on Kungsleden (Kings Trail), Abisko National Park, Lapland, Arctic Circle, Sweden, Scandinavia, Europe

Aurora borealis (Northern Lights) on Kungsleden (Kings Trail), Abisko National Park, Lapland, Arctic Circle, Sweden, Scandinavia, Europe

Aurora borealis (Northern Lights) on Kungsleden (Kings Trail), Abisko National Park, Lapland, Arctic Circle, Sweden, Scandinavia, Europe

Tour group of eco-tourists in Maruti Suzuki Gypsy King 4x4 vehicle in Ranthambhore National Park, Rajasthan, Northern India

Tour groups of eco-tourists in Maruti Suzuki Gypsy King 4x4 vehicle at waterhole in Ranthambhore National Park, Rajasthan, India

Northern Lights (Aurora borealis) over mountains, Kebnekaise Fjällstation, Kungsleden or king's trail, Province of Lapland, Sweden, Scandinavia, Europe

Long exposure car lights leaving a straight light trail in front of Gwanghwamun main entrance gate to Gyeongbokgung Palace in historic part of downtown on a clear, twilight night in Seoul, South Korea, Asia

Midnight sun in the Fjaell Mountains with a stream along the Kungsleden, The King's Trail, Lapland, Sweden, Europe

Rainbow and boat on Lake Teusajaure, Kungsleden, The King's Trail, Lapland, Sweden, Europe

Midnight sun and an old suspension bridge in the Tjaekta Valley, Kungsleden, The King's Trail, Lapland, Sweden, Europe

River alongside Kungsleden, The King's Trail, Lapland, Sweden, Europe

Striking view of Kings College, Cambridge, England

Man diving into La Salle Lake while hiking on a two-week trek of the Sierra High Route in the John Muir Wilderness in California. The 200-mile route roughly parallels the popular John Muir Trail through the Sierra Nevada Range of California from Kings Canyon National Park to Yosemite National Park.

A female hiker in a red shirt celebrates reaching the top of the Mount Storm King trail in Olympic National Park at sunset.

Four female backpackers hiking along beach at sunset, Lost Coast Trail, Kings Range National Conservation Area, California, USA

Horses are led through the mountains at King's Canyon National Park, California, United States of America

Horses are led through the mountains at King's Canyon National Park, California, United States of America

Horses and riders lead a string of pack animals near Sixty Lake Basin in King's Canyon National Park, California, USA, California, United States of America

Horses are ridden through King's Canyon National Park, California, USA, California, United States of America

Petroglyphs On The King's Trail, Waikaloa, Island Of Hawaii, Hawaii, United States Of America