These frozen caves seem almost otherworldly as they daylight illuminates them. Matej Kriz’s shots reveal the beauty of the brilliant caves, but he’s also very aware of how deadly they can be. The photographer captured the amazing shots in the Vatnajokull National Park on the Breidamerkurjokull glacier tongue. Here: The ice caves, taken in the Vatnajokull National Park in Iceland, on November 11, 2017. (Photo by Matej Kriz/Caters News Agency)

Shimmering clearest blue and stretching as far as the eye can see, this is one of Iceland's famed crystal ice caves. The giant solid waves look frozen in time but they are slowly moving along as part of the Vatnajokull Glacier – which stretches across eight per cent of the island. The images were captured in February 2014 by British photographer Rob Lott, 49. Photo: A wide view of Rob Lott in the crystal ice cave in the Vatnajokull Glacier, Iceland. (Photo by Rob Lott/Barcroft Media)

Sculptor Jiri Genzer of the Czech Republic carves an ice sculpture at the Disney Dreams Ice Festival in Antwerp November 27, 2014. Some 60 artists from all over the world participated in the festival, making sculptures out of around 500 tonnes of ice. The festival will open on November 29 until January 11, 2015. (Photo by Yves Herman/Reuters)

Hwang Bo-young (L), a North Korean defector who was a member of the North Korean National female ice hockey team, prepares for practice with South Korean teammates on March 13, 2006 in Seoul, South Korea. Young, 27-years-old, became a captain of the South Korean National Female Ice Hockey Team. (Photo by Chung Sung-Jun/Getty Images)

Ice sculptures based on the caracters by Walt Disney are shown at the snow and ice sculpture festival on December 15, 2011 in Brugge, Belgium. (Photo by Mark Renders/Getty Images)

Workers carve ice art works at Harbin Ice and Snow World one day before the 32th Harbin International Ice and Snow Festival in Harbin city, China's northern Heilongjiang province, 04 January 2016. The festival will run from 05 January to 05 February. (Photo by Wu Hong/EPA)

Max Niedermaier of Germany collides with uncontrolled motorcycle of Niclas Svensson of Sweden during Astana Expo FIM Ice Speedway Gladiators World Championship at the Medeo rink in Almaty, Kazakhstan, February 18, 2017. (Photo by Shamil Zhumatov/Reuters)