Visa
Visas can be a big nuisance when traveling. For someone from Western Europe or other affluent countries it's usually a whole lot easier than for someone from say Afghanistan.
Links
- VisaMapper is a collaborative map where are displayed the countries where you need a visa or not.
- Visa requirements by nationality articles in Wikipedia
- There's a wiki dedicated to visas but thus far it never really reached critical mass: visawiki.org (to be moved into nomadwiki).