This page provides walkthrough for the remaining locations in the secret city of Belur, which you explore in the seventh chapter of Uncharted: The Lost Legacy. The key moment of the exploration when you reach the library and explore it to find artifacts, including an altar with a large tusk.
After you have reached another part of ruins, across the underwater tunnel, take do not hurry to take the stairs and explore the side area shown in the above screenshot first. Here, you have to dive again, to find treasure (4/16 -Jeweled Pipe Mouthpiece) at the bottom.
You can now swim towards the large staircase, but do not climb up just yet, because there is a photo opportunity location (2/7) here. After you have taken the photo, approach Nadine, who is ready for another conversation. Thanks to this, you can have another optional conversation (1/3). After you have obtained all of the collectibles, climb up the stairs to reach a small corridor to the library.
While in the library, you can examine interactive items you find there, placed on various shelves. What is more important, is finding two treasures (5/16 -Handcarved Sheesham Breadbox; 6/16 -Silver Comb Perfume Flask).
After you have obtained the collectibles, approach the altar with a tusk in the center and interact with it to examine it. This will start a cutscene.
Take the passage that has opened and, after you have reached the next location, find the camera icon to interact with the photo opportunity location (3/7). After you have taken a photo, jump into water. Also here, you have to dive, to find treasure (7/16 -Bronze Deccan Incense Burner) at the bottom.
Again, dive in the spot shown in the above screenshot. While underwater, swim up to the roots blocking the underwater tunnel. Start tapping the interaction button to remove them. Swim into the next area.
After you leave the water, examine the area, because there is another treasure (8/16 -Satavahana Hourglass) here. After you have found the treasure, start climbing over the rocks. You will need the hatchet several times. Eventually, you will reach the viewpoint, where there is Nadine. This is another photo opportunity location (4/7). Chloe, for fun, will be pushed back into the water, so you will have to climb up again.
Cross the passage right next to the photo location and squeeze between the rocks to get through. Reach the location, where you can grapple the hook and reach the part of the ruins that used to be inaccessible (stone ledge with a torrent of water flowing down).
Stand by the flooded part of the chamber shown in the above screenshot to find another photo opportunity location (5/7). Additionally, check out all the corners of the chamber to find treasure (9/16 -Chalukya Griffin Candlestick).
After you have explored the area and found all the collectibles, find a new spot where you can dive and swim into a small tunnel (shown in the above screenshot). You do not have to cross the entire tunnel in one take, because you can resurface along the way to get some air.
You will swim across another tunnel to reach a large cave with a huge statue of Shiva. Inside, there is a puzzle to solve. It has been described on the next page of this walkthrough.