On the far west side of the bridge, you will find a ventilation floor. Use a Construction character to drill through it and make a hole for a geyser to come out. Use the geyser to reach some handholds and climb them to reach the top of a monument, where you'll find a Super Build. If you have more than 30,000 bricks, use them to build The Model Citizen and get this Gold Brick.
At the top of the western tower, cross four obstacles to the right until you find a position. Use an Astronaut character to place an Astronaut flag there and complete one of the twenty Conquer Districts challenges, obtaining this Gold Brick.
On the west side of the eastern tower, go behind the ledge to find a ventilation floor. Use a Construction character to drill through it and make a hole for a geyser to come out. Use the geyser to reach some handholds and climb them to reach a white edge. Move to the right of two white edges and a handhold to reach the platform with a blue and white panel. Use it to cross a large gap and move to the right of two more white ledges and another handhold. Use another blue and white panel to cross another large gap, move to the right of another white edge, and scale one more wall to reach the top of the eastern tower. There, you will find a lost pig on the right. Get on it and take it to the pig cannon that you will find when you cross four obstacles on the left, where you will put it inside. Finally, use a Farmer character to load the cannon and shoot the pig towards the Fort Meadows farm, completing one of the twenty-two Return Pigs challenges and earning this Gold Brick.
On the left side of the top of the eastern tower, next to the pig cannon, you will find a free race token. Grab it to unlock a Free Run at the spot where you started climbing for the previous Gold Brick. Go back to where you started climbing and head to the designated spot to start the Free Run. In the Free Run, take the same route you did until you reach the place where you grab the Red Brick to win the race. You have 30 seconds to win it, but there are seven clocks along the way that you can grab to set the time back 20, 15, 14, 13, 8, 7, or 3 seconds. Winning the race will give you this Gold Brick.
At the far east side of the bridge, destroy a phone booth to build a blue trampoline. Use it to reach some handholds and climb them to reach the top of another monument, where you'll find a silver statue of Rex Fury. If you have the Unlimited Dynamite extra activated, you can use a Miner character to place a dynamite in a barrel without having to search for one. After placing the dynamite, move away from it and it will explode, destroying the silver statue, completing one of the seventeen Destroy Silver Statues challenges and earning this Gold Brick.
On the west side of the western tower, use a Police character to knock down some wall fragments and build a blue trampoline. Use it to reach a wall with blue and white pieces and climb on it to reach a very high walkway. There, use the Grapple Gun to cross a large gap and move to the right of handholds and a white edge until you reach four walls. Climb them by jumping from one to another until you reach another white edge, where you will have to move to the platform on the left. Swing on two blue poles to reach the other side and move to the left of two white edges and a handhold to reach a further platform. Swing on two more blue poles to reach the other side and climb a wall to reach one more white edge. Move to the left of this one and climb one more wall to reach the top of the western tower, where you will find this character token on the left.