From the World's largest twine ball to an obscure monument to a patriotic pig, RoadsideAmerica.com is a great website to help you explore the weird and wacky side of America. The site has indexed over 9,000 offbeat tourist attractions and have produced a number of Google Maps to help you visit them for yourself.
The Roadside America Maps page links to 50 state interactive Google Maps. There are also treasures waiting to be disinterred in the Pet Cemetery, a Video Vault, Global Attractions and a Hall of Immortals.
The markers on each of the maps are categorised into 'reviews', 'visitor tips' and 'hotels'. The attractions are also listed in the map sidebar and you can filter the markers by 'The Best', 'Major Fun', 'Worth a Detour', 'Worth a Stop' and 'Mildly Interesting'.
If you like the look of a particular offbeat tourist attraction you can add it to your 'My Sites' list. Bookmarked attractions can then by viewed on your very own 'My Sights' Google Map.