This is where The Institute is located. However, there are no important loots in the immediate area itself. This is also the starting point for the main story quest “Hunter/Hunted”. With the story active, your Pip-Boy will capture the “The Courser Signal”. Tuning to it will allow you to track down the Courser. You can also enter the main building itself called the CIT Rotunda.
In the Rotunda, you'll hear supermutants and synths battling with each other. The lower floor has very minimal loot so you have to find the stairs to the east leading up to the upper floors. On the third floor, you'll find the red steamer trunk and Advanced wall safe inside the classroom to the east. Further east is a staircase that leads to a door to the rooftops