When you visit the page, you see a list of jobs. you pick one job, you choose your city. on the sidebar, you see a US map. In there you can find huge amount of employment opportunities. They have really done their research and have jobs from almost every major job board and even the individual corporations' employment listings.
Not only that they shows you different types of career opportunites from almost every employer career page, jobs website, association website, employment news, newspaper classified ad, online classified ad and recruiter website that they find in the world. You can see at their testimonal EmploymentCrossing Reviews too. Come to EmploymentCrossing.com and see best career opportunities for you.