My rankings:
#1 - "The Bifocal Monocle of One-Eyed Jack" (good)
#2 - "The Keys to the Alhambra" (good)
#3 - "The Golden Cricket Cage of Khan" (good)
#4 - "The Snow Cone of Mt. Kilimanjaro" (good)
#5 - "The Cracked Crown of the Spanish King" (good, maybe a little higher)
#6 - "Blackbeard's Treasure Map" (good)
#7 - "John Henry's Lost Hammer" (good)
#8 - "The Dried Apple Half of William Tell" (good)
#9 - "The Smashed Printing Plate of Frederick Douglass" (good)
#10 - "The Lucky Pig of Amelia Earhart" (good)
#11 - "The Marble Armrest of Xerxes" (good)
#12 - "The Lost Lion Tail of Little John" (good)
#13 - "The Secret Battle Plan of Nathan Hale" (good)
#14 - "The Stone Head of the Evil King" (a little lower)
#15 - "The Crown of Queen Nzinga" (good)
#16 - "The Enormous Feather of the Me Linh" (a little lower)
#17 - "The Codebook of Mata Hari" (good)
#18 - "The Stolen Arm of Shiva" (good)
#19 - "The Silver Cannonball of Grandy Nanny" (a little higher)
#20 - "The Treasure Map of John Lafitte" (a little higher)
#21 - "The Sacred Ring of Sultan Suleiman" (lower, the episode was interesting until the temple run)
#22 - "The Bent Shaving Pan of Jedediah Smith" (good)
#23 - "Elizabeth I's Golden Ship" (a little lower)
#24 - "The Lost Logbooks of Magellan" (lower)
#25 - "The Lily-Crested Crown of Clovis I" (good, maybe a couple spots higher)
#26 - "The Walking Stick of Harriet Tubman" (good)
#27 - "The Golden Goblet of Attila the Hun" (good, maybe a little lower)
#28 - "The Oracle Bowl of Delphi" (lower, not even bottom 30(
#29 - "The Missing Weather Maps of Charles Lindbergh" (a little higher)
#30 - "The Plumed Headdress of Cosa Rara" (higher)