Hmm. I'm going to split this response into two categories. What I know before I resort to research and then, of course, the researched one.
I believe Kalapapa is a town in Hawaii that used to be a leper colony. As for the height of the cliffs, no idea.
Here's what I have gleaned from the web:
Kalaupapa is now a national park dedicated to preserving the story of forced isolation of those afflicted with Hansen's Disease (Leprosy) from 1866 to 1969. (NPS.GOV) As outside diseases were brought to the islands, the Hawaiians felt that isolation was the only solution. Kalaupapa was the perfect solution because of its unique geography. It was surrounded on three sides by the ocean and the peninsula was cut of from the rest of Molokai by the tallest sea cliffs in the world. (visitmolokai.com) At their highest point they are 3,300 ft above sea level. (wikipedia.org)