Ice climb in London The huge ice skating area at Somerset House has been drawing crowds each winter for years, but last November an ice wall was added for the first time, bringing even more danger and excitement. Standing more than 26 feet high is a long line of pure ice, featuring three climbing faces of varying difficulty using crampons  , ice picks and ropes. Using it costs about PS40 (020 78454600; www.somersethouseicednk.org.uk). It is open from late November to the end of January. Hang-gliding   in Rio De Janeiro According to the hang-gliders of Rio, once you've swooped   over the city's streets, gazing at the Sugar Loaf, and the city of Niteroion, the other side of Guanabara Bay, you will understand why birds are peaceful animals. Accept the romantic idea on a 30-minute cycling flight from the 525-meter Pedra Bonita in the Sao Conrado mountain down to the Sao Conrado beach. It costs around PS55. Contact Air Adventures (00 21 9843 9006; www.riohanggliding. com). Skywalk in Sydney This experience takes having a look at a nice view to the whole other level, as you are suspended more than 850 feet (260 m) above street level, controlled to a glass viewing platform of Sydney Tower. It's the city's highest building. After a thorough briefing and being fitted with protective skysuits, skywalkers make their way along two-purpose-built walkways and platforms, which have transparent floor, while a guide points out landmarks. Night time skywalks are also available. It costs PS46. Mountain boarding in Leeds Riders roll down hills and fly off jumps, doing tricks. A number of special mountainboard parks have opened around the country (see www. ridethehill.com). But the Leeds body of the Boarding Society practice at least twice a week in the city in locations that include Roundhay Park. Those with their own boards are welcomed to join them. Contact the society at www.scuz.info. Alternatively, beginners can get lessons in Halifax at the Another World (01422 245196; www. Mountain boarding.co.uk) mountainboard center for PS8 an hour, with equipment. Which of the following is open at night?
Ice climb in London. Hang-gliding in Rio De Janeiro. Skywalk in Sydney. Mountainboarding in Leeds.