Why do some of the national parks in the United States resemble the European Alps? Geologist Dr. Robert Darga answers this question.

Why are some rock formations and animals found on more than one continent? The explanation dates back to the Ice Age.

In Yellowstone Park, visitors can see many indigenous animals in their natural habitat and wonder at the park's natural hot springs.

Geysers represent a very popular tourist attraction in Yellowstone Park. How do they work and where do they come from? And what is sandstone? The video answers these questions.

In this segment, we learn about the role weather plays in the creation of rock formations in the national parks of the United States.

We learn more about how water interacts with the minerals in the rocks, and visit Monument Valley, a popular spot for filming westerns and commercials.

The Colorado Plateau and the Grand Canyon are just a few of the amazing geographical features of the Southwestern United States.

We visit Bryce Canyon, where valuable fossils have helped understand the geological history of the planet. The sandstone spires of the canyon are breathtaking.

In this segment, the narrator explains where the name Bryce Canyon came from, and why the sand dunes in the US and the large deserts of the world might be related.

The narrator explains how the breathtaking rock formations of Antelope Canyon came to be, and why mountains around the world can provide a metaphor for human existence.

Russia is gearing up to host the 2018 World Cup. Sarah Rainsford and Steve Rosenberg, the BBC’s Moscow correspondents, take us on a tour of Sochi, Volgograd, and Saransk, where we can see the stadiums that have been constructed and get a sense of each town.

We continue our tour of Russian cities hosting the 2018 World Cup. We're taken to Kazan, Rostov, and Ekaterinburg.

This video explores three more venues for the 2018 World Cup: Samara, St. Petersburg, and Kaliningrad. Aside from the arenas, Stalin's bunker, the Hermitage museum, and the beach are spotlighted attractions.

In final segment of this BBC series, we visit two more cities hosting the World Cup: Nizhny Novgorod and Moscow.

The Great Barrier Reef: it’s one of the most iconic, most beautiful and most diverse locations on earth. Stretching from Cape York in northernmost Queensland down to Bundaberg on the central coast, this enormous living organism (the world’s largest) is nothing short of breathtaking.