U&Eden HD Friday

The 40-day Cologne Carnival celebration sets the tone for Bourdain's visit to this city that offers an array of delicacies like blood sausage with Himmel und Erde and schnitzel

Bourdain explores Senegal, which despite deep-rooted religious beliefs, is known for its nightlife, global musical influence, fashion scene, food culture and history of tolerance

The Liverpool and Manchester Railway, which revolutionised rail travel when it opened in 1830, becoming the first railway to have a signalling system among many other things

The Tablelands Railway Line in Queensland, Australia, which changed the face of one of the country's great states when it was constructed in the late 1800s

Tim Dunn uncovers the secrets above, below and inside London's Charing Cross Station. He also looks at the modern wonder of the Ordsall Chord in Manchester

Tim Dunn heads underground at the magnificent Victorian Bramhope Tunnel in West Yorkshire, one of the longest tunnels in Britain when it was built

The naturalist investigates whether animals and plants have developed an awareness of mathematics, including bamboos that flower exactly the same around the world