Originally posted by vinyblaster:

Since the crypt density nerf you may well need to visit a few large swamps before finding a single crypt.

I don't remember finding a single large swamp without at least a dozen of crypts. A single narrow strip of swamp between other biome and ocean is something i will never look into. I don't count that as a swamp biome at all. It may be long and look like its big, but it rarely has any crypts. Just skip it and search for the real swamp.