Web Clip Art
This excellent About website has a huge library of links in many categories. Check People, Animals, Holidays, Vehicles and many other topics, to illustrate your travel albums.

Vehicles: Air, Land, Rail and Water
More categories from About's guide for Web Clip Art.

Animated Gif's Archive
A great collection! Trains, boats, animals, kids, pirates... Plenty to illustrate family trips or flights of fantasy. Christmas, holidays, etc., too.

Animated Transportation: By Dezign
Planes, cars, trains, saiboat, paddlewheeler, magic bus....

Animation Factory
Check the Holiday or Transportation categories; or Creatures, for animals; Miscellaneous includes food (burgers etc.), kites, spaceships.

Marine Life Clip Art
From About's guides for Saltwater Aquariums.

Tropical Nights
"Island-inspired images": borders and buttons; animated GIF's of swimming fishes, jumping dolphins, etc.

Picture This: Finding Web Images
Detailed advice on using the major search engines to find just the right image you want-- by About's guide to Web Search.

Creation, Tutorials, and Help
Lots of help and advice in using clipart, from About's guide for Web Clip Art.

(Don't) Print That GIF
Can web clip art be used to illustrate printed documents? Yes; with some cautions about quality. About's guide to Desktop Publishing has advice.