A couple of days in the northern Norway area around Bodo. The world's largest maelstrom at Saltstrommen (the salt current) is a channel where the tidal flow twice daily causes currents to run at 25-30mph into and out of the fjord. The fast moving water causes dangerous turbulence, whirlpools, eddys, and some of most aerated seawater possible, resulting in the richest fishing environment anywhere.
Norway has no shortage of water, and lakes and waterfalls can be found everywhere. They have exploited this natural resource by creating numerous hydroelectric power plants, and there are photos of one here, including the amazing access to the hilltop facilities via an old wooden stairway, which was unfortunately closed the day I visited. It reminded me a bit of this forum thread viewtopic.php?f=2&t=5952
I also got to enjoy the midnight sun ... but it actually sets at midnight. (Daylight savings time makes 1am closer to the middle of the night, and since this isn't in the middle of the time zone, the low point of the sun actually occurs between 12:30 and 12:45.) On the date I was there, the sun set at midnight and rose again around 1:30am.