
above: some of the World's 10 largest Domes

1. Fantasy Entertainment Complex - Kyosho Isle, Japan, 710 feet
starnetint.com/projects/gaming.htm

2. Multi-Purpose Arena - Nagoya, Japan, 614 feet
link 1
nagoya-dome.co.jp

3. Tacoma Dome - Tacoma, WA, USA, 530 feet
http://www.tacomadome.org/DomeInfo/Facts.htm
SeattleSonics
tpctourism.org
westernwoodstructures.com

4. Superior Dome - Northern Michigan Univ. Marquette, MI, USA, 525 feet
superiordome
westernwoodstructures.com

5. Walkup Skydome - Northern Arizona Univ. Flagstaff, AZ, USA, 502 feet
nau.edu/skydome
westernwoodstructures.com

6. Round Valley High School Stadium - Springerville, AZ, USA, 440 feet
round_valley_ensphere
elks.net
link 3

7. Former Spruce Goose Hangar - Long Beach, CA, USA, 415 feet
cashassociates.com
link 2
NOTE:The former hangar is now a reception area for Carnival Cruise Terminal in Long Beach.
press_releases/carnival1
Above web site doesn't have much on the dome itself, but they've got a couple links to media contacts who could probably provide some excellent current pictures of the hangar (now baggage terminal).
temcor.com/pdf

8. Formosa Plastics Storage Facility - Mai Liao, Taiwan, 402 feet
temcor.com/bulkstorage.htm
temcor.com/mailiao.pdf

9. Union Tank Car Maintenance Facility: Baton Rouge, LA, USA, 384 feet
bestofneworleans.com/cover_story.html
synergeticsinc.com/bodytext/union.htm

10. Lehigh Portland Cement Storage Facility - Union Bridge, MD, USA, 374 feet
link







For a more up to date listing, see Tim Tyler's page:
http://largedomes.com/
Tim Tyler's large geodesic dome listing
I would question your #1 ranked dome. It is a truly remarkable and dome-like structure, but I would not consider it a dome and it is not geodesic. A noteworthy structure, I would suggest it does not belong on this list.
The structure was a waterpark called Ocean Dome and associated with the Seagaia resort, in Miyazaki, Japan (on the island of Kyushu). Unfortunately, it was a money-losing venture from it's construction and, at one time, Seagaia had the distinction of being the most-endebted third sector (combined public-private financing) project in Japan. It was subsequently purchased by Ripplewood, and the resort and its excellent golf courses are now managed by Sheraton.
There is an excellent photo by Megapixie (Max Smith) at http://en.wikipedia.org/wiki/Image:SeaGaia_-_Miyazaki_Ocean_Dome_-_outside.jpg.