I've visited Legoland in Denmark, alone and with no kids. Well, 10 years have passed since then, but I remember it being great! So much to see, so much to explore... you forget about other people instantly.
Back when I lived in SoCal, I got to go to Lego Land during a private pre-opening they had. The girl I was dating at the time, her father owned the construction company that did a lot of the building there and Six Flags Magic Mountain.
You can skip to 1:39 for the view of everything. Though you wont be able to see the two lego sets at the very bottom. They are Count Duku vs Yoda and Palpatines Arrest.
Nice... I'm told there was a redesign around 2012, this is the later version. Supposedly the fuel tank was changed, it looks less realistic but it's stronger in terms of keeping the booster rockets attached.