Do the scandinavian countries accept each other's currency (i.e. Norway, Sweden and Denmark)? Are there plenty of ATM machines in and around the railroad stations and in the major cities?
Mike : in each country, get the money for that country. ATM machines are in the railroad train stations at Oslo and Stockholm. Those train stations have everything : money exchange, computers for internet access, supermarket, sandwich and coffee cafe. The Oslo main train station has a Tourist Information office , and book store that has the newest popular books in English. In Stockholm, a Tourist Information office is a few blocks from the train station. A pharmacy is across the street from the Stockholm train station. The Copenhagen train station is near everything.
Yes and yes, except they normally don't take each others' coins. Many places will also accept euros, dollars and pounds. When they do, they give you your change in the local currency. And before anyone leaps in here to warn that you don't get the best exchange rate, of course not. However, it isn't terrible; and you need to consider how long you'll be in one of those countries, the cost of small withdrawals, and the cost of converting back to another currency if you are left with large amounts. A few years ago we did a house exchange in Denmark, with short trips to Sweden and Norway. Towards the end of our time in each country, we were careful to use cc's as much as we could and use up as many coins as possible. In fact, we ended up with just a few Danish kroner, which we left for our hosts. Airport shops are great for getting rid of loose change.
Mike,
I would answer no to the first question and yes to the second. Some tourist shops and major department stores will accept payment in other currencies, however usually not at a particularly good exchange rate. ATMs ("bankomats") are plentiful. Bankomats in some towns close to the borders will allow you to choose the currency of the neighboring country.
Credit cards are also more widely accepted in Scandinavia than in some other parts of Europe. For example, in Stockholm most taxis and many restaurants accept cards.
If you like - or are concerned - get 100$ or so of each currency from your bank ahead of time. But ATMs are everyplace (banks) and there are some of the exchange burros that can take your other money and convert it to the local if you have a lot left over when you enter the country. While its a usually better deal to just use ATM there (vs change from 1 to another to a third) its not a big deal. Just try to use ATM for the amounts you need.