• National Geographic Map Machine
• Plate Motion Calculator
• How far is it?
  You can calculate distances between many sites on the globe. You can input information as names of places or as longitude and latitude and see the results on a map
• Sunrise/Sunset/Twilight and Moonrise/Moonset
  You can calculate the sunrise, sunset, twilight, moonrise, moonset and twilight times for any location if you know the longitude and latitude.
• Internet Atlas and Timezone Server
• Place Look-up
  Enter the name of the place you want to look up
• Geographic Information and Visualisation tool
• Image Catalog
• "GOES" - "Geosynchronous Operational Environmental Satellite"
  GOES takes the moving pictures of clouds used on TV weather broadcasts.

Data-Bases: Text and Maps

• CIA fact book + map
• City Net
  
• Raven Maps and Images
  Beautiful wall maps of the United States and the world.
• Views Of The Solar System
• Geography Departments Worldwide
• Geography Information categorised by subject
• Earth Sciences - Yahoo
• Reference Searcher for Ocean Floor Tectonics
• NASA

Subject Data Bases: Weather, Earthquakes

• Weather - Yahoo
• Weather - Middle East
• Channel 2 Weather Forcast (Israel)
• Craig's Weather and Earthquake Reports, Images and Animations
• WeatherNet
  The Internet's premier source of weather information.
• Latest Quake Information
  United States Geological Survey, Geologic Division.
• World-Wide Earthquake Locator

Educational Projects and Learning Materials

• The JASON Project
• The GLOBE Program - An International Environmental Education and Science Partnership
• Blue Ice: Focus on Antarctica!
• Welcome To David Smith's "Mapping The World By Heart" Home Page
• The Virtual School: The Virtual Science Project

Some more interesting sites you do not want to miss:

• Peterson Birds Online
• National Geographic Magazine