Cave swimming pool in Santorini, a Greek tourist destination popular with Instagram lovers.
With its dramatic volcanic landscape, whitewashed cottages and blue-domed churches, the picturesque Greek island of Santorini is never short of tourists.
Many travel by boat before making their way up hundreds of steep steps to the island's main town, with donkeys available to carry those who can't or don't want to walk.
But the donkeys have been taking too much of the strain, say activists who have launched a campaign to make visitors think twice before they hop on. A United Kingdom (UK) organization, People for the ethical Treatment of Animals (PeTA) has launched a petition to stop what they term as 'mistreatment of the donkeys'.
PeTA and supporters wonder why most tourists prefer using donkeys to climb up and down the long stairs yet there's a cable car for that purpose.