Ready Reference: Travel

Earthwatch: Participate in field research projects worldwide. Examples of projects include: Search for England's First King, Rare Plants of Kenya, Irish Music, Moose and Wolves at Isle Royale National Park, Michigan.
Fodor's Travel Online: Farefinder, travel links, hotel and restaurant index.
Lonely Planet: Information for world-wide destinations including costs, attractions, culture, environment, getting around.
ParkNet: Find information on US National Parks. You can also make reservations. From the National Park Service.
Travelocity.com: Airline and hotel reservations, car rentals, vacations and cruises, special deals, destination guides..

Air Traffic Control Center: Displays major airport delays in real time, including severe weather and ground delays.
Airlines of the Web: Reservations, discount fares, airline links, weather information, etc. Free registration required.
Airline Toll-Free Numbers and Websites: Alphabetical list with toll-free numbers and links to web sites of American and international airlines .
INFOHUB Train Listings: Links to web pages for train systems in North America and the World.
Orbitz: Travel site sponsored by major world airlines. Provides deals on airfares as well as car rentals and hotel rooms.

Maporama: Street-level maps for many European countries as well as the US.
MapQuest: Includes an interactive street guide to maps anywhere in the continental US, and TripQuest: city to city driving directions for cities in the continental United States, Canada and Mexico.
How Far Is It?: Finds the latitude and longitude of two places, then calculates the distance between them (as the crow flies). Options include a map showing the two places and driving directions.

Center for Disease Control Home Travel Information Page: Includes Reference material for International Travel, Geographic Health Recommendations, Disease Outbreaks, Additional Information.
U.S. State Department, Bureau of Consular Affairs Home Page
OANDA Classic Currency Converter: View an exchange rate.
The Universal Currency Converter: Allows you to perform interactive foreign exchange rate conversion on the Internet. Will also generate a list of currency values relative to the base currency that you specify.