12 km norht of the Arctic Circle, along route 382, you can see the fantastic Jockfal waterfall. This is a great place where to fish the Salmon. The staff of the restaurant near the bridge will give you all the information you need.
Lars Levi Laestadius was the founder of the religious movement Laestadianism. He was vicar
in Pajala from 1849 to 1861, and also a notable botanist, scientist and advocate of temperance.
The Pajala market, or "Pajala Marknad" is _the_ event in the summer. This is when all the people who grew up in Pajala but has moved elsewhere come home, and a lot of tourists visit Pajala as well...the population of Pajala probably increases by 1000% during that weekend.
As for the market, well, there are a lot of things to see and buy. Everything from rattan products to jewellery to Sami bread...there are usually also art exhibitions, of varying quality. When you get hungry (and candy/donuts/popcorn/warm chips aren't enough), try a "suovas kebab" - smoked reindeer meat, salad and dressing in a pita bread, so delicious! I wish there were more local crafts and things in the market though, instead of ten different stalls selling cheap socks... :-)
The market is always the second weekend after Midsummer. This means it's in the beginning of July.
The easiest way to get to and from Pajala is probably by car. Driving from Luleå, for example, takes about 2.5 hours, more if you want to see some of the sights along the way...
There are also bus lines from e.g. Luleå and Kiruna, but there are only a few buses per day. http://www.ltnbd.se/
Pajala also has an airport now! There are flights Mon-Fri (except for most of the summer, for some reason) to and from Luleå (Kallax airport). The journey takes about 45 minutes. http://www.airport.pajala.se/
If you are driving, watch out for reindeer on the road! While elks are more dangerous to hit with your car because they are bigger, reindeer are dangerous because they don't just dash across the road like elks do, they walk _along_ the road or even on it.
A black plastic bag attached to one of the snow sticks along the road is a warning that a flock of reindeer is grazing in the area. But even if there are no warning signs, you should still pay attention to the sides of the road. Look out for tracks in the snow during winter, or the headlights of the car reflecting in the eyes of the animals if it's dark.
Reindeer are not the brightest animals in the world, because if they are standing on the road and a car is approaching, they will not always move out of the way. Honking the horn doesn't always help either. The best way is just to slow down and wait until the reindeer move off the road...
...read Mikael Niemi's book "Popular Music" (in some places it's called "Popular Music From Vittula"). The author is from Pajala and the story takes place there. In fact, when you come to Pajala you can take a walk to see all the places mentioned in the book! (I think the tourist information has a map...)
The book was a big hit in Sweden and has received several prizes. It has been made into a film (not shot in Pajala though, but around Tärendö, 45 km away) and several plays.