Head to the map's upper left, follow a marker route, and cross the white entrance line to visit Da Hills. In Taxi Boss, Da Hills is a hillside residential area in Boss City. Look for the homes beside the curved road when you arrive.
Where Is Da Hills in Taxi Boss?
Da Hills is on the upper-left side of the in-game map, around the hillside homes. If you're looking for “the hills,” head to this residential area.

Open your map and place a marker at the location above. Follow the cyan navigation route toward it. The marker gives you a destination to drive to, while the homes and bend in the road help you recognize the entrance when you get there.
How Do You Visit the Hills in Taxi Boss?
Drive across the white entrance line and into Da Hills to complete the visit objective. Reaching the neighborhood's edge is your cue to keep driving into the area.
Mark the hillside neighborhood
Open the map, find the upper-left residential area, and place your destination marker there.
Follow the cyan route
Drive along the navigation route until you reach the curved road beside the hillside homes.
Cross the white entrance line
Continue across the white line into the neighborhood. Look for the bend, roadside guardrail, and houses on the slope.

Don't stop short of the entrance line. The visit triggers when you cross it and enter the area, so drive through before checking the task.
How Do You Know the Da Hills Visit Is Complete?
Your company task panel shows the Da Hills visit at 1/1 once it is complete.

Check the Da Hills row itself to see that you've finished this visit. With that objective done, choose your next stop: unlock Mafia Cave, look into Taxi Boss Race Club, or work on the best way to get money in Taxi Boss.