The Titanic submersible disaster shone a spotlight on extreme travel. But why do some people choose to pursue possibly fatal adventures? 

Extreme tourism: inside the holidays where death is always a risk

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It’s not unusual to be drawn to the extraordinary, but seeking out danger is different

Extreme travel often makes you question whether you’re doing the right thing – not least when your fellow travellers die

Extreme tourists seek out the most remote, inhospitable and hostile places, and some pay the ultimate price. Why?