From the Muelle Turístico, at the foot of Lasserre, there are boat trips to Beagle Channel wildlife sites such as Isla de los Lobos, home to the southern sea lion and the rarer southern fur seal, and Isla de Pájaros, a nesting site for seabirds, mostly cormorants. These cost around US$20–33 per person for a 2.5-hour trip on oversized catamarans such as the Ana B, Ezequiel B, and Luciano Beta. With extensions to the penguin colony at Estancia Harberton and a visit to the estancia itself, the cost is about US$50.

Rumbo Sur (San Martín 342, tel. 02901/422441, fax 02901/430699, www.rumbosur.com.ar) and Tolkeyén (San Martín 1267, tel. 02901/437073, www.tolkeyenpatagonia.com) sell excursion tickets from offices at the foot of the Muelle Turístico, where Héctor Monsalve’s Tres Marías Excursiones (tel./fax 02901/421897, marias3 [at] satlink [dot] com) operates four-hour trips (US$30–35 pp) on a smaller vessel (eight passengers maximum) that approaches Isla de Lobos more closely than the catamarans. Monsalves also lands on Isla Bridges, a diverse island with cormorant colonies, shell mounds, and even the odd penguin.