A volcanic eruption, a powerful tornado and a traditional camel race through the desert are some of the incredible images caught on camera by travellers.
The pictures have been entered into the 2015 National Geographic Traveler Photo Contest from around the world.
They provide a snapshot of human life and nature in countries spreading from the US to Pacific Islands, South America, the Middle East and Africa.
National Geographic Traveler Photo Contest
National Geographic Traveler Photo Contest
1/15 Traveler Photo Contest
Sunrise at Grand Prismatic Spring, Yellowstone National Park, Wyoming. Aerial Image. If you look carefully, you might notice the person enjoying this natural beauty
2/15 Traveler Photo Contest
Beautiful tornado tracks in open farm land narrowly missing a home near Simla, Colorado
3/15 Traveler Photo Contest
The Villarrica volcano, lcated more than 700km south of Santiago de Chile, has been erupting since 3 March. The photograph was taken on 11 May in the city of Pucon.
4/15 Traveler Photo Contest
Freediver Carlos Correa ascending towards the light on a break during the 2015 Caribbean Cup of Freediving in Roatán, Honduras. Every time I look at this photo it relaxes me and makes me wonder about how these athletes can reach depths of 300ft. and hold their breath for upwards of 4 minutes
5/15 Traveler Photo Contest
This disorienting photo was taken from a cliff overlooking Lake Louise in Banff national park. The two people are enjoying a canoe ride on Lake Louise's turquoise waters
6/15 Traveler Photo Contest
Every year, humpback whales come to Kingdom of Tonga during July to September. The mothers raise their babies and when they are enough strong they go far away to the cold water. During whale watching activity, you can live some incredible experiences by interaction with this fabulous mammal. This young calf played with me during 30 minutes under the control of his mother, a great memory
7/15 Traveler Photo Contest
I visited Deadvlei in 2008. The personal emotional and spiritual connection I felt with "The Beginning" I know I had to return someday. That time came in May of 2015. I knew I had to make a photograph that reflected how I felt during my first visit and on this visit. I did capture it. I fell it was not just a sense of place but a sense of time
8/15 Traveler Photo Contest
The herd bull watches over his small harem as they cross the river while the Tetons catch the day's first rays
9/15 Traveler Photo Contest
The famous hall "Halle der Circe" is located at the end of the highest-lying touristic cave in the world (2100 m alt.), which can be reached only by experienced cavers. With proper lighting the permanent ice in the hall shines in beautiful blue tones, which add enchantment atmosphere to the frozen hall
10/15 Traveler Photo Contest
The Rock restaurant just off shore in Zanzibar. As the sun set, I was taking photos of The Rock before going out there to have dinner. As the light levels dropped, the light came on in the restaurant and I knew I had my shot
11/15 Traveler Photo Contest
(Camel Ardah) As it called in Oman, it’s one of the traditional styles of camel racing between two camels controlled by expert men, the faster camel is the loser one, so they must be running by the same speed level in the same track
12/15 Traveler Photo Contest
Lion cub jumping on mother’s head, Naboisho Conservancy, Masai Mara, Kenya, Africa
13/15 Traveler Photo Contest
I was working at my family farm some 150 km from the Calbuco Volcano when a friend called me and told me what was happening, I took my camera and tripod and drove to Puerto Varas where a quiet chaos was ensuing and decided to keep on driving to darker area. Upon arrival the volcano was quiet again, not even vapour coming out so a little disapointed I went to rest. Two hours later hell broke loose and I could take some of the pictures I was dreaming about ever since Chaiten eruption in 2008
14/15 Traveler Photo Contest
A 6-year-old boy imitates the elder shepherds of a small Romanian village
15/15 Traveler Photo Contest
The people of the Omo Valley in Ethiopia have lived their lives virtually undisturbed by outsiders for centuries. What’s more, the region in which they live is even more ancient. The site is on the UNESCO World Heritage List, and according to UNESCO, the area is “unlike any other place on Earth in that so many different types of people have inhabited such a small area of land over many millennia.” This image is part of a series focusing specifically on Women of the Omo Valley
Photographers captured sights including the icy "Halle der Circe" cave in Austria, Yellowstone's huge Grand Prismatic Spring and the night sky from the Namibian desert.
A spokesperson for National Geographic said the top prize is an eight-day expedition to Costa Rica and the Panama Canal, and entries will be judged on "creativity and photographic quality".
The competition is open for entries until 30 June and the winner will be announced in August.Reuse content