Step master – Switzerland's Sarah Marquis walked from Siberia to South Australia -- 10,000 miles over 1,000 days.
Cold crossing – It took her three attempts to cross Mongolia's inhospitable South Gobi, where temperatures drop to minus 30 C (-22F)
Smoke break – "At one point this horseman just arrived from nowhere and offered me a cigarette," says Marquis.
Cold desert – "It was cold and windy. My only question was whether I'd survive the extremely low temperatures at night," she says about her time in the Gobi.
Elusive cat – In South Gobi she came across scientists searching for the elusive snow leopard. They put infrared cameras in the mountains to capture image of the big cat.
Rare view – "This was a special ecosystem in South Mongolia, where water ran behind the dunes," says Marquis. "It was a precious water supply for both me and the animals."
Pull expedition – "I had a really difficult time dragging my cart in the dunes," Marquis says.
Ships of the desert – "One morning in Mongolia I woke up to a comforting, melodic sound," she says. "I opened my tent to find camels all around me."
Path finder – Marquis didn't have a topographic map in China, so she just followed mountain footpaths like this one.
Sick days – In the Laos jungle (pictured) Marquis suffered from dengue fever.
Tent-ridden – "My body went through a rough time," she says. "I put on a lot of weight before I started walking, but it didn't last long."
Hot hot heat – An aboriginal boy looks after cattle in the Australian outback, where temperatures can reach over 40 degrees C (104 F).
Croc bait – When she was crossing Australia's remote north, Marquis opted for a hammock to keep herself safe from large crocodiles.
Pup gent – "My best walking companion," Marquis says of her dog. "My extraordinary D'Joe."
Done – Where land meets sea: This tree in South Australia marks the spot where Marquis finished her extraordinary 1,000 day adventure.