Glacier Martial is a pleasant excursion that sits in Ushuaia's backyard. Avenida Luis Fernando Martial winds 7km (4 1/4 miles) up from town to the base of a beautiful mountain amphitheater. From here, a chairlift takes you on a thrilling ride to the small Glacier Martial ($12/£8.20). It's a long walk up the road, and there are no buses to take you there. Visitors usually hire a taxi for $12 (£8.20) and walk all the way back down, or arrange for the driver to pick them up later. At the base of the chairlift, don't miss a stop at La Cabaña (tel. 2901/424257), an excellent teahouse with a wraparound outdoor deck and mouthwatering cakes and pastries.