Because I couldn't keep it down to ten.
13. Castle Doom
Estimate Pieces: 1000
Includes Dr. Doom, Thing, Invisible Woman, Black Panther, Doombot (x2)
12. SHIELD Helicarrier
Estimated pieces: 3000
Includes Nick Fury, Dum Dum Dugan, Maria Hill, Agent Coulson, Major Carol Danvers, Agent Jimmy Woo, Nick Fury LMD (partially damaged), Ultron, Captain America (classic), Falcon, Redwing
11. Apocalypse's Celestial Ship
Estimated pieces: 1400
Includes Apocalypse, Famine, Pestilence, War, robot horse (x3), Archangel, Cable
10. Hulkbusters
Estimated pieces: 600
Includes Abomination, General Thunderbolt Ross, Betsy Ross, Glenn Talbot, Clay Quartermain, Samuel LaRoquette
9. Doctor Strange's Sanctum Sanctorum
Estimated pieces: 800
Includes Doctor Strange, Wong, Clea, Baron Mordo, Mindless One, Dormammu
8. X-Mansion
Estimated pieces: 2000
Includes Professor X, Beast, Iceman, Juggernaut (with removable helmut), Colossus, Forge, Jean Grey, Lockheed
7. Baxter Building
Estimated pieces: 1400
Includes Mr. Fantastic, HERBIE, Franklin Richards, Willie Lumpkin, Annihillus, Alicia Masters, Puppetmaster
6. The Daily Bugle
Estimated pieces: 500
Includes Spider-Man (black), J. Jonah Jameson, Ben Urich, Scorpion, Chameleon
5. Asteroid M
Estimated pieces: 1200
Includes Mystique, Blob, Quicksilver, Scarlet Witch, Toad, Psylocke, Gambit, Rogue
4. Fantasticar
Estimate pieces: 500
Includes Johnny Storm, Invisible Woman (clear), Franklin Richards, Mole Man, Moloids (x2)
3. Ghost Rider
Estimated pieces: 100
Includes Ghost Rider & Blackheart
2. Sentinel
Estimated pieces: 400
Includes Cyclops, Nightcrawler, Storm
1. Galactus
Estimated pieces: 1000
Includes Silver Surfer, Watcher, Human Torch