A three-week trek through the Himalayas to climb a 20,000-foot peak on the Tibetan border.
A five-day trek through Yosemite National Park.
Irish actress and presenter Audrey Ni Fhearghail spends 10 days climbing in the Swiss Alps.
Trekking on the Cuillinn Ridge.
A search for the lost city of Machu Picchu.