Boardwalk to nesting wandering albatrosses — the largest wingspan of any bird — on a tiny island in the Bay of Isles.
One of the world's largest wetlands.
Africa's second-greatest antelope migration.
Beaches packed with seals and penguins.
Vast park of the white-eared kob migration.
Striped desert canyon walls.
Turquoise lakes among sharp peaks.
Giant otters on the Rupununi river.
Remote valley facing the Hindu Kush.
A 3,938-metre glaciated peak on the Caucasus crest, the highest point of South Ossetia.
Pristine rainforest and canopy walk.
Near-perfect volcanic cone rising from the sea, ringed by rainforest.
One of the world's great mountain roads.
Vast untouched rainforest, UNESCO-listed.
Liberia's rainforest wilderness.
Remote islands of saltwater hippos.
River of remote villages and carvings.
Primary rainforest of rare wildlife, UNESCO-listed.
Desert massif of oases and Tuareg life.
Biodiverse peak, UNESCO-listed.
Cross one of the Sahara's emptiest expanses.
Remote northern savanna park of lions, elephants and giant eland at the heart of a huge protected wilderness.
The world's longest freshwater lake.
Vast savanna park, UNESCO-listed.
Zimbabwe's largest game reserve.
Rainforest reserve of forest elephants.
Pristine "blue pearl" lake near Siberia.
Dunes, canyons and dinosaur fossils.
The "Mountains of the Moon" — glaciers on the equator, giant lobelias and bogs on a multi-day trek towards Margherita Peak.
Walking safaris on the Zambezi floodplain among famously relaxed elephants.
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