Here are links to just a few of the interesting Urantia websites available:

Saskia's great study of the races of Urantia:
http://www.squarecircles.com/studyaids/humanrace.htm

Journey Through the Universe: https://www.youtube.com/watch?v=9CkbbohKDoY
(We sometimes begin our study group by projecting this on the wall.)

Matt Block's source studies:
http://www.squarecircles.com/urantiabooksourcestudies/SourceQuote/index.htm

Hal Katzen's Reports:
http://www.ubthenews.com/Reports_List.htm

One very interesting report to start with maybe: (since there are so many!)
http://www.ubthenews.com/topics/Adam_and_Eve.htm

From TruthBook's site, download some beautiful art:
http://truthbook.com/religious-art-gallery/urantia-book-wallpaper

Or Fred Smith's wonderful animals he draws on the pages of his Urantia Book!
http://truthbook.com/religious-art-gallery/animal-drawings

(While visiting the TruthBook site, don't forget to sign up to have the Daily Quote
from the Urantia Papers emailed to you.)

Gary Tonge's beautiful chart:
http://www.visionafar.com/nshgl/GaryTonge/index.php

Then there's many many YouTube presentations  search for "Urantia" 
this one is Chris Halvorson on the etymology of the word Urantia:

https://www.youtube.com/watch?v=kbVb8g2n1uw

Be sure to go to Grayghost's website:
Bill Sadler's Master Universe Studies (http://www.satania606.com/index.html)

And don't miss "One by One," a 1989 interview
of JJ Johnson, Kristen Maaherra, & Dick Johnson by Johnny Greenwood:
http://vimeo.com/33073835

The Fellowship's Website has tons of good study aids:
(Be sure to visit the Meredith Sprunger Archive, and peruse the workbooks done by Doc Sadler).

http://urantiabook.org/index.html

Check out the Symmetry of Soul archive:
(Especially good are the team's discussions of the Mansion Worlds).
http://www.symmetryofsoul.org/archive

And here is the home page of the Urantia University Institute:
(Where beginners and experienced students alike can take classes from the best).
http://urantiauniversity.org/

If you want more, there is even a Website of Urantian Websites!
http://www.ubwebsites.com/