Voyaging by cargo ship is a more leisurely and potentially greener way to go. They will often take you to places the ordinary tourist would never visit. Sandi Toksvig talks to Ghislaine Armitage and Hannah Isaacs about voyaging as passengers amongst the containers to China and back, and to David Baboulene about his experiences as a crew member on freighters round the globe - including being attacked by pirates.
Although there are just ten basic types of clouds they vary in style and formation all round the world. Sandi hears from Gavin Pretor-Pinney of The Cloud Appreciation Society about how cloudspotting can be a perfect pastime for travellers, and why the 600-mile long 'Morning Glory' cloud in Australia has become a tourist attraction in itself.