Travel the 50 states

So, somewhere in my life I decided that I would like to visit the fifty states (and maybe throw the Virgin Islands, Puerto Rico, and Washington, D.C. into the mix), and so far, I'm doing pretty well, with over 60+% under the belt so far.  I'm missing the middle section of the Canadian border, Alaska, Maine, the Caribbean territories, and a few select others that I have to find a way to get to to check that off the bucket list.  While at it, though, I thought it might be a good idea to start figuring out "what there is to see" in the various states, so that if I planned a trip there, I would know what exactly I would want to go see or do.  That being the case, I decided to start a list here of just a couple of things to see or do when visiting the various states.  Some of them, I'm clearly drawing a blank.  If you have ideas for any of these (if you live there or you've been there or know someone who has), throw them in the comments for me and I will try to augment the list.  Also know, this is a subjective list entirely based on whether it would interest me to visit that area or perform that activity, so I might not use your suggestion, but still appreciate it :).  Oh, and those in bold are still on my list to visit.  Thanks!

• Alabama
• Civil Rights Museum - Birmingham
• Vulcan - Birmingham
• U.S.S. Alabama - Mobile
• Alaska
• added - Historic Downtown Juneau
• added - Mendenhall Glacier (via helicopter)
• added - Mount Roberts - viewing bald eagle nests
• added - Travel to Alaska via cruise
• Arizona
• The Grand Canyon - Grand Canyon National Park
• Arkansas
• California
• Wine Country - Napa
• Hollywood - Los Angeles
• Colorado
• Connecticut
• Delaware
• Florida
• Walt Disney World - Orlando
• Emerald Coast - Destin
• Georgia
• Hawaii
• Pearl Harbor - Honolulu (Oahu)
• Haleakala - (Maui)
• Hanauma Bay - Honolulu (Oahu)
• Idaho
• Boise State University - Boise
• Illinois
• Wrigley Field - Chicago
• The Sears Tower - Chicago
• Shedd Aquarium - Chicago
• Indiana
• Iowa
• Kansas
• Kentucky
• Churchill Downs - Louisville
• Louisiana
• French Quarter - New Orleans
• Shreveport Casinos - Shreveport
• Maine
• added -  Mt. Katahdin
• added -  Bar Harbor
• added - Lighthouses
• Maryland
• Massachussetts
• Old North Church - Boston
• Fenway Park - Boston
• Cape Cod
• Michigan
• Minnesota
• Mississippi
• Missouri
• Montana
• Nebraska
• Nevada
• Las Vegas
• New Hampshire
• New Jersey
• New Mexico
• New York
• Empire State Building - New York
• Statue of Liberty - New York
• World Trade Center Memorial - New York
• The Metropolitan Museum of Art - New York
• North Carolina
• Cherokee - Cherokee
• North Dakota
• Ohio
• The Rock and Roll Hall of Fame and Museum - Cleveland
• Oklahoma
• Oregon
• Craft breweries (Rogue, Deschutes, Hopworks, Bridgeport) - Portland
• Pennsylvania
• Liberty Bell - Philadelphia
• Independence Hall - Philadelphia
• Rhode Island
• South Carolina
• South Dakota
• Mount Rushmore - Mount Rushmore
• Crazy Horse Memorial - Crazy Horse
• Tennessee
• Tennessee Aquarium - Chattanooga
• Grand Ole Opry - Nashville
• Beale Street - Memphis
• Great Smoky Mountains National Park - Gatlinburg
• Texas
• JFK Museum - Dallas
• Dallas Cowboys Stadium - Arlington
• Alamo - San Antonio
• Utah
• Vermont
• Virginia
• Washington
• Space Needle - Seattle
• West Virginia
• added -  Black Water Falls State Park
• Wisconsin
• Wyoming
• Old Faithful - Yellowstone National Park
• Devil's Tower National Monument - Devil's Tower
• Puerto Rico
• U.S. Virgin Islands
• Washington, D.C.
• The White House
• The Lincoln Memorial
• The Washington Monument
• The Capitol
• The Smithsonian Institute
• Arlington Cemetary
• The Vietnam Memorial

Anything else I'm missing?  What do you do in North Dakota?  Montana?  Maine?