AutoWeek compiled a good list weird attractions along America’s highways.
A few of them are on Route 66, including Cadillac Ranch, Bug Ranch, two Wigwam Motels (although AutoWeek mentions only one), World’s Largest Catsup Bottle, and the Leaning Tower of Texas near Groom.
(AutoWeek ought to send Roadside America a thank-you card for undoubtedly helping compile that list.)
I’d add the Bottle Tree Farm, Gemini Giant in Wilmington, Stonehenge of Rolla, Blue Whale of Catoosa, Big Cross of Groom, World’s Largest Rocking Chair and POPS’ big pop bottle.