MUSEUMS AND SIGHTS
National Museum
Danish civilization in chronological order.
Ny Carlsberg Glyptotek
Scandinavia's top art gallery.
Tivoli Gardens
An amusement park in the Danish style.
All Kinds of Museums
This one is a bit tricky but here goes. Choose "Attractions & Events", then "Sights & Attractions", then "Museums" and finally "Copenhagen." You have finally arrived at descriptions, addresses, and prices for all the museums in Copenhagen. By choosing "Sightseeing" you can get information on the Carlsberg brewery tour, a glassworks tour and other guided tours.
Viking Ship Museum
H. T. Ohlsen again has an outstanding page this time about Vikingeskibshallen with lots of photos
Frederiksborg Castle
This site is by "Expedia". The castle (called a sloat in Danish) doesn't seem to have their own yet.
Louisiana
This museum of modern art in Humelbaek has it's own website.
Kronborg Castle
H. T. Ohlsen has an outstanding page about Kronborg Castle with lots of photos.