The Remote Terminal at this location is located on the bridge leading to the entrance to the Water Works. However, like most locations in the game, the building cannot be entered. This one is a Remote Terminal for land vehicles.
After activating the Remote Terminal, you can find this character under the Water Works. In front of the Remote Terminal, you will find a panel with Robin's Hazard Suit. Put it on as Robin, go down the right wall and you will find green and purple chemicals. Clean them with water and you can face Killer Croc. (If your water meter runs out, you can refill it with seawater, but be careful, don't go too far or you will drown.) In his boss fight, he will jump and use stomp attacks to create shockwaves. Dodge them and hit him to remove a heart. Repeat this three times to defeat Killer Croc. When you remove his three hearts, you can buy him for 125,000 studs.
Behind a fence on the road south of Water Works, you'll find a black box, but you'll have to use a flying character to get to it. Use Lex Luthor's Deconstructor to deconstruct it and reveal this Red Brick, which costs 300,000 studs.
After purchasing the LexCorp Micro-VTOL, hop on it and complete a flying race to obtain this Gold Brick.
On the southern part of the Water Works bridge, quickly destroy five bouncing planted bushes to reveal this Gold Brick.
In the building southwest of the Water Works, quickly destroy five bouncing flower beds to reveal this Gold Brick.
To the right of the previous Gold Brick, you'll find a panel with Batman's Sensor Suit. Put it on as Batman, activate invisibility and climb a wall without being seen by a security camera. Then use a grappling hook on the bat symbol on the right to reach an upper roof and follow the path of studs. Turn invisible to climb the wall on the left without being seen and use a grappling hook on a bat symbol on the left to climb to another higher roof. Use a zip line to cross a gap and reach the other side of the building. On the other side, go right and use X-Ray Visions to scan a green wall. Press the attack button to destroy all the red supports and step on a button to reveal another wall to climb. Climb the wall you raised, climb another one and you will reach the roof with the Gold Brick. The Gold Brick is protected by a security camera, so be invisible so it doesn't see you and you can grab the Gold Brick.
Use a flying character to reach the roof of a building east of the Civilian in Peril of the Metro Station (Central) and quickly destroy four bouncing water tanks to reveal this Gold Brick.
To the left of the Water Works, you'll find this Civilian in Peril trapped in a block of ice. Use a laser character to thaw the ice and save this civilian.
To the upper right of the Red Brick fence, you will find this Civilian in Peril trapped in a fire hydrant. Freeze the water using a freezer character to save the civilian.