Hialeah is accessible from the 826 Palmetto Highway. The 103rd/49th Street Exit will take you to 49th Street, the major shopping thoroughfare in Hialeah.
Hialeah is easily accessible from the Miami International Airport. Taking Lejeune Road north will take you directly into the center of Hialeah.
Hialeah also has a Tri-Rail train station at Hieleah Market (this train connects to Miami Airport, Fort Lauderdale Airport, and West Palm Beach Airport). MetroRail has a staion in Hieleah.
Hialeah is also near the Greyhound bus station on NW 27th Street. You can take the #37 or #42 buses into Hialeah, though it isn't a very pedestrian-friendly area. (A taxi ride should be relatively cheap).
The #37 & #42 buses also connect the Miami Airport to Hialeah. 
The park is open from sunrise to sunset. For more information, visit Miami Dade.gov Parks website
49th Street is the major shopping area in Hialeah. Westland Mall, a mall including stores such as Macy's, Victoria's Secret and Guess is located on 49th Street and 17th Avenue. Driving east from the Palmetto exit of Hialeah on 49th Street will expose you to strip malls and major stores such as Marshall's and TJ Maxx. Also, at 37th Street and 17th avenue, there is the Westland Promenade, with major chain stores like Target, Best Buy and Ross.
For more of a bargain, you can hit up the Opa-Locka Hialeah Flea Market, located at 127th street and 42nd Avenue. The flea market is open on Saturdays and Sundays from 5 am to 7pm.
Another must have visit for bargain shoppers is Flamingo Plaza, a plaza of shopping that consists of thrift stores, including Red White and Blue and the Salvation Army. These shops are located on East 10th Avenue and 9th Street in Hialeah, and are the best place to hunt for treasures, including furniture, vintage clothing, housewares, books, records, jewelry, etc.
There are several chains located on 49th Street, including Chili's (located inside of Westland Mall), Red Lobster, Denny's and Picadilly's.
One of the best watering holes and restaurants in South Florida is the Flanagan's chain, which has a location in Hialeah, located at 1550 W. 84th St. This is the best place hands down for a drink, bar food, and a burger or steak in Hialeah.