Why were Lindsey and Craig Foreman traveling through Iran on their motorbikes?

Lindsey and Craig Foreman were making a journey on their motorbikes with the goal of reaching Australia to present research at a conference. Their trip was documented as part of their exploration of what constitutes a 'good life' and was focused on building human connections through their travels. Despite being aware of travel warnings about Iran, the British couple chose to continue their journey through the country before they were detained under espionage charges. Their detention became public knowledge only when Iranian state media released an image of them meeting with the British ambassador.