Though Downtown San Bernardino might not have many top sights, you can venture to the surrounding area to see attractions like San Manuel Stadium and National Orange Show Events Center.
If you're spending some time in Orange Show, National Orange Show Events Center and San Bernardino Golf Club are top sights worth seeing.
Oak Glen is well-liked for its restaurants. If you'd like to do some sightseeing in the greater Yucaipa area, you might plan a trip to Vivian Creek Trailhead or Wildwood Canyon.
When in South Redlands, you can plan a visit to Mountain Grove Shopping Center and San Bernardino County Museum, some noteworthy sights in the nearby area.
While you're in Downtown Redlands, take in top sights like Paxton's Wine Cellar and jump on the metro at Redlands–Downtown Station to see more of the city.