Popocatepetl Volcano, Mexico.  Although the 40,000 people evacuated from the near surroundings of this erupting volcano were allowed to return to their homes in late December, 2000, Popo remains in a state of mild to moderate eruption. Check out what it looks like at this moment by clicking on http://www.cenapred.unam.mx/popo/UltimaImagenVolcan2.html (Remember it may be night time in Mexico City.)