Tripolia Bazaar gets its name from Tripolia Gate, with its three archways. This is actually the main entrance to the City Palace and Jantar Mantar. However, only the members of the royal family and their guests are allowed to enter that way.
Nearby is the tallest structure in Jaipur -- Iswari Minar Swarga Sal, the heaven piercing minaret. It serves as an excellent reference point as to your location. It's possible to climb to the top of the tower and get a breathtaking view over the Old City.