The final stage of Simon Reeve's journey along the Tropic of Capricorn, the line of latitude that crosses South Africa, South America and Australia.
Monty Don visits the world's 80 best gardens. He visits South America, a continent twice the size of Europe with 50,000 endemic plants.
By Michelle Roberts
Health editor, BBC News online
- Copyright: Reuters
The killing of MP Sir David Amess has highlighted a security dilemma for politicians across the globe.
Some of the BBC's international correspondents explain what the situation is like in other countries.
BBC South American correspondent Katy Watson says being an open, accessible people's representative in the major cities of Brazil - Sao Paolo and Rio de Janeiro - where wealth and inequalities are polarised, politicians are more likely to be flanked by bodyguards.
Brazil is deeply divided politically and President Jair Bolsonaro was stabbed during his leadership campaign.
Being an MP in India - the world's largest democracy - comes with a lot of privileges, a security detail is one of them, writes Vikas Pandey in Delhi.
In recent years, attacks on politicians have taken the form of ink-throwing and slapping.
But a number of politicians, including former PMs Indira Gandhi and Rajiv Gandhi, have lost their lives in violent attacks.
In the Netherlands, Dutch lawmakers do not hold surgeries and only a select few Dutch politicians, including the anti-Islam leader, Geert Wilders, have protection.
The prime minister, Mark Rutte, pictured below, has been seen cycling to meetings.Copyright: Getty Images
By Pablo Uchoa
BBC World Service
By Mary O'Connor & Joseph Lee
By George Bowden
Residents in some parts of Sao Paulo state saw the sky turn orange.
By Marcus Alves
A severe drought in South America is due in part to deforestation in the Amazon jungle.
By Micah Luxen & Kumar Malhotra
By Samba Cyuzuzo
BBC Great Lakes
The story of how, in the 1970 and 1978 World Cups, Brazil and Argentina's military dictators took a vested interest in their nation's football dreams.