If you're planning on taking public transportation, the Foothill Transit buses run through Baldwin Park. A one-way fare costs around $1.75. If you're driving, traffic can be heavy during peak hours, so plan accordingly. Parking is available at all the locations.
If you have more time, check out the nearby Angeles National Forest or the City of Industry. If you have less time, skip the bowling alley and head straight to Azusa Pacific University.
The closest airport to Baldwin Park is the LA/Ontario International Airport (ONT), which is about 25 miles away. The Los Angeles International Airport (LAX) is about 30 miles away from Baldwin Park.