The varied one by Werner

Challenge series hosted by r_n_r. Challenges start on Saturdays.
I will try to start topics as varied as possible to ensure everybody can participate in my challenges. My challenges will vary in terms of restrictions and the photographic techniques as well. Enjoy submitting your pictures here and "Gut Licht", Werner from Vienna, Austria
Finished (9 challenges)
Entries: 148
Winners announced: 20th June, 2009 GMT
Winner: California Adventure
There is fun, there is action and there a ton of opportunities to get good pictures. Post your best picture taken in any amusement park all over the world.
Entries: 200
Winners announced: 13th June, 2009 GMT
Winner: Science City Valencia, Spain
Post your favourite colorful pic of any architecture at night. Old or new architecture, lens used and framing is complete up to you.
Entries: 196
Winners announced: 6th June, 2009 GMT
Winner: The white lake
In the last one of my nature / landscape challenges you are asked to post landscape pictures which are process using any kind of HDR / DRI technique. In other words, multiple exposures of the same image must be post processed to one single image.
Entries: 83
Winners announced: 30th May, 2009 GMT
Winner: Mystic Autumn
In the next nature / landscape you are asked to submit your favorite picture of one of the major National Parks in the south-west of the States. I will accept pictures out of the following National Parks: - Grand Canyon - Monument Valley - Arches - Bryce Canyon - Zion - Death Valley Any overall scene, detail, night or daylight shot or similar is welcome.
Entries: 81
Winners announced: 23rd May, 2009 GMT
Winner: Haunting
I'm about to start some challenges with the overall subject nature / landscape. In the first one you are asked to post your best picture taken in the Yosemite National Park / California. Any overall scene, detail, night or daylight shot or similar is welcome.
Entries: 100
Winners announced: 16th May, 2009 GMT
Winner: can he make it?
Post any pic which is related to riding a bike, a bike race or similar. You, any friend or professional should be alright.
3. Fisheye
Entries: 82
Winners announced: 9th May, 2009 GMT
Winner: Jurassic Park
Show us your best shot taken with a fisheye lens
Entries: 100
Winners announced: 2nd May, 2009 GMT
Show you best indoor portrait using flash (on or off-camera).
Entries: 50
Winners announced: 25th April, 2009 GMT
Winner: Paris, Arc de triomphe
Show any picture of any famous European city. Any scene (architecture, a specific sight, the flair, the people...) is appreciated.