BBC Earth HD

Simon goes wild swimming in the crystal clear lake of Buttermere.

Travelling through the Peak District at full steam, pulled by the Royal Scot - one of the finest locomotives ever built.

The excavation begins with the discovery of a large brick-built oven. It's a mystery as it is too big to be just for a private residence.

The coastal metropolis of Miami faces a triple threat of crumbling limestone bedrock, ferocious superstorms and relentless rising oceans.

Deep in the heart of the Sahara desert in Morocco, Ben visits a mud brick oasis, where he meets British-born Karen, who has built a guest house and artists' retreat in this inhospitable location.

The end of winter has arrived, and Alaskans venture out in search of survival necessities.

From a vineyard that has been making one of Britain's favourite tipples - Port - travel down the line that once transported it to the city that gave it its name: Porto.

Simon goes wild swimming in the crystal clear lake of Buttermere.