On the beautiful walk from Fira to Imerovigli, you can enjoy breathtaking views of the caldera, as well as the luxurious white hotels built on the steep slopes of the calderas. It seems that many of the buildings on the Santorini islands are built in caves, dug into volcanic rock, hence the solid look and feeling. Hotels in Santorini have turned the cave houses into hotel rooms.
And since the houses are built on top of the mountains, you can find hundreds of steps crossing the hills and connecting the buildings down to the port. And when it comes to uphill, some are lazier than others. That is why you might see a bunch of donkeys at the foot of the mountain, ready to carry the tired tourists up to the city. Donkeys for Greeks are like camels for Arabs.