Not all hotel pools are built the same: some are heated, others are filled with saltwater, some are equipped with slides and many are on the ground level. They may also be only open to hotel guests.

Czech explorers confirm that a hidden thermal lake in Leskovik (Albania) is the largest underground: 294,350 cubic feet.

Styling and designing around an above-ground pool can be challenging, but there are plenty of ways to transform this space ...