the Penis Park of Oslo and the many public penises in Helsinki, why not visit a museum dedicated solely and exclusively to the wonders of the penis?
Iceland may be off the beaten path for most tourists, but it's not as difficult to get to from the West as, say, Bhutan. the land of the penis), and there are lots of reasons to go: glaciers, hot springs, Old Norse heritage, gay-friendly people.
And the Museum of the Penis, AKA the Icelandic Phallological Museum.
There are 293 specimens from 93 species, every mammal in Iceland -- bears, seals, reindeer, dogs, moose, seals, rats, bulls. Also a few non-native mammals, like lions and elephants.
The smallest (from a hamster) is less than 1/10th of an inch long, and the largest 5 feet (part of a great blue whale's penis; the whole thing would extend 15 feet).
Trolls turn to stone in daylight, so of course the troll penis is stone.
The elf penis is very long, but since elves cannot be seen, it is invisible.
It's located on Laugavegur 116, a block from the mixed bar Kjallarinn.
If you can't make it to Iceland, visit their online store, where you can buy phallic mugs, baseball caps, bottle openers, designer condoms, and "ball scratchers."
See also: Halloween Surprise: Tricking and Treating with Yuri's Student