Technology has made it a lot easier to travel nowadays: sometimes all you have to do is just to click.
National Geographic has just released a series of 360° panoramas that allows anyone with an Internet connection to experience Vietnam's Son Doong cave, one of the world's biggest.
Photojournalist Martin Edström set out with a team in January 2015 to build a virtual tour of this “infinite” cave.
Son Doong is located in the central province of Quang Binh's Phong Nha-Ke Bang National Park. It became known as the world's largest after British explorers discovered it in 2009 with the help of a local guide. The biggest chamber of Son Doong is more than five kilometers (3.1 miles) long, 200 meters (660 ft) high and 150 meters (490 ft) wide.
Edström, whose work has been supported by the National Geographic Society's Global Exploration Fund, hopes to bring the cave to as many people as possible.
He also wanted to document Son Doong in its relatively untouched state, just in case planned construction projects to make the cave more accessible to tourists go through.
Check out the project here