Foreign Correspondent

Italy's population is ageing and with towns dying out, residents in Sicily have undertaken a grand social experiment. They're selling abandoned houses to newcomers for just one euro in a bid to breathe new life into old towns.

In the jungle of central Vietnam lies Son Doong, a magnificent underground cave passage, the largest in the world. Undisturbed for millions of years, its future has been placed in doubt with plans to make it a tourist mecca.

Eighty years since Japan and the Allied forces waged a battle at Guadalcanal, Solomon Islanders are still paying the price with thousands of unexploded devices left behind and the threat of leaking oil from rusting warships.

In Japan the ancient sport of sumo is wrestling with how to accept women competitors on an equal footing, challenging deeply held traditions. We meet the women who are trying to modernise attitudes in a sport they love.