Some great sites for Particle Physics:
Learning Physics from ALEPH events.

CPEP, the Contemporary Physics Education Project.

Particle Physics Education Sites

Particle Physics Surfing...web links from the University of British Columbia.

Suggested Readings...links to articles written in journals like Scientific American and National Geographic.

Fermilab....America's accelerator crown jewel.  Also Fermilab's site for students.

CERN......"where the web was born".......Fermilab's European counterpart.

SLAC.....the Stanford Linear Accelerator.

Leon Lederman.....author of"The God Particle"
 

Here's one just for fun.....but we mean that in a good cognitive way:  Almost Real Physics

Some Great Sites for Fusion Energy:
Cold Fusion:
FuseEdWeb....great site for students.

    - from theU.S. Department of Energy

What Japan is doing with fusion.

JET........Europe's joint effort at magnetic containment.

Cold Fusion......all you could hope to find in one well-done site.

If you could be inside a tokomak.....

Some Great Sites for Cosmology:

A great overall cosmosite from NASA and their MAP project.

A virtual trip to see a black hole....from NASA.

The MACHO project.....looking for dark matter in our Milky Way galaxy.

The Big Bang

LIGO......searching for gravity waves at Cal Tech.

The COBE project.......searching for the cosmic background radiation.

A star is born!......watch stellar evolution.