(#20) Jizo along the path to the Kanmangafuchi Abyss, in Nikko:

(#19) Small waterfall in Rocky Mountain National Park:

(#18) Umeda Sky Building, in Osaka:

(#17) Maple leaf on tree, in Nara:

(#16) View of Kyoto from the Silver Pavilion (Ginkaku-ji):

(#15) Maple leaf and tiles, in Kyoto:

(#14) Fallen aspen leaves, Rocky Mountain National Park:

(#13) Red Gate of Miyajima:

(#12) Flamingo, Denver Zoo:

(#11) Himeji Castle:

(#10) Lego sand trooper:

(#9) Double Arch in Arches National Park:

(#8) Mallard, Denver Zoo:

(#7) Bamboo grove, behind the Silver Pavilion (Ginkaku-ji) in Kyoto:

(#6) Goose swimming in Duck Pond, City Park, Denver:

(#5) Sleeping sea lion, Denver Zoo:

(#4) Leaves and moss, Kyoto:

(#3) African birds, Denver Zoo:

(#2) Pensive brown bear, Denver Zoo:

And finally, my favorite picture:
(#1) Gardens of Kinkaku-ji, in Kyoto:

And that's it. It's somewhat hard to really pick a favorite, though. Depending on my mood, or the time of day, anything in the top ten (or more!) could be it.