The following websites give detailed information about what Careers are like.
U.S. Department of Labor Occupational Outlook Handbook
This website is a great place to read about Occupations and covers a variety of topics about each type of work, including: The Nature of the Work, Working Conditions, Training and Qualifications Needed, and the Employment Outlook.
O*NET OnLine Help
O*NET OnLine has detailed descriptions of the world of work for use by job seekers, workforce development and HR professionals, students, researchers, and more!
O*Net by Interests (linked to Holland Scores):