It will cost you for the boat trip over there (I can't remember how much) and an additional two Euros a piece (Adults) for entry - take cash! the nearest cash m/c is alongawayaway. A good strong pair of shoes is advisable: There is a lot to see on a very compact site, which is incredibly hard to get around and piece together in it's own time frame. There are several forts, each built on the remains of another; there is a settlement (or two, or few?); in addition to the famous Leper colony. This place has some incredible history behind and in it!!! The Leper colony was the latest settlement on the island. The lepers were treated really well, they had access to medicine and the means to earn a living, get married have children (the children were removed and adopted for obvious reasons). They pretty much built their own society with help from the mainland. It is wonderful and sad at the same time. A WORD of WARNING: Greek health and safety is NOT UK health and safety! You are expected to be able to think and act wisely! There are some very high, potentially lethal drops off cliffs and from buildings including Canon emplacements; so watch your fearless teenagers and have a mind for yourself as well.