Most visitors to Lodhi Gardens tend to enter the gardens through Gate #1, on Lodhi Road, from where the most obvious historical structures in plain sight are Bada Gumbad and Sheesh Gumbad, or—if you head westward, parallel to Lodhi Road—the Tomb of Mohammad Shah Syed. The rather less-visited tomb of Sikandar Lodhi lies to the north, well away from these other tombs, and is also worth seeing.
This tomb, built after the death of Sikandar Lodhi in 1517, was commissioned by his son Ibrahim Lodhi. It is situated, on a high platform, beside a stream (which is straddled by the Athpula, an eight-piered bridge). The tomb is surrounded by a fairly high wall which looks fairly formidable. It has a gateway opening on the stream below, but this has been closed off with a barred gate, so to enter the tomb you have to go around to the front, and climb up the (rather crumbling) steps leading to the main gate of the tomb.
Through this gate, you enter a walled garden, on the left (westward) side of which is a wall mosque. The tomb, an octagonal building, has an exterior which looks quite similar to the Tomb of Mohammad Shah Syed. Inside, however, it is decorated beautifully with lots of intricate multi-coloured tiles. The tomb has been closed off with wire mesh on all its doorways except one (which is covered with bars), but you can peek in and have a look.