Some of the types of the visa are Business Visa, Conference / Seminar Visa, Diplomats, Employment Visa Entry, Sports & Mountaineering Visa, Journalist Visa, Medical Visa, Missionary Visa, Student Visa, Tourist Visa, etc

Take a look on the different visas to Chicago:

http://travel.state.gov/visa/visa_1750.html

http://www.passportsandvisas.com/localpassport/chicagopassport.asp

Check on the following link on visa expediting services:

http://www.passportvisasexpress.com/visas.xml

For example, if you are a non-American, you need to take visa to enter Chicago, let's take you are from Australia, you need to approach the US embassy for getting visa and passport clearance, you must show all your records and the reason to visit Chicago, they check all your records and give you visa, if you are applying for tourist, you can get easy than other, but you cannot extend the visa after entering into the country.

The Lincoln Square is one of the more well-known squares located in the northern part of Chicago, IL and also the more heavily populated one of the city with around 44,000 people living in the neighborhood.

The Square has a primarily German influence, but you will find restaurants and shops catering to a wide variety of cultures. The Lincoln Avenue is where the shops and restaurants in the place are mainly concentrated. The Western Avenue and the Lawrence Street mainly consists of businesses.

The Lincoln square has many places of attraction including:

- Rosehill Cemetery

- Sulzer Regional Library

- Cambodian Association of Illinois

- Old Town of Folk Music

For the past two years the square has been hosting the annual Lincoln Square Christkindl Market which is a major attraction during winter.

http://www.lincolnsquare.org/

http://www.lincolnsquarechristkindl.com/