Sinus infections usually begin with the symptoms of a cold (for example, a runny nose, occasional cough and/or mild fever), and then develop into pain and pressure in the sinus cavities. About 7 to 10 days after initial cold-like symptoms other symptoms develop that suggest you may have a sinus infection.
The Ruins of Sescheron. The Ruins of Sescheron are available in the Adventure Mode of Diablo III. Specifically in Act III, near the Arreat Crater. They were released as part of patch 2.3. The area is designed to have a melancholy feel to it, with elements such as funerary art and pyres.
Entrance to the Mysterious Cave. The Mysterious Cave is a two-floor cave in Dahlgur Oasis in Act II of Diablo III. It can spawn in one of the two watered-in nooks in Dahlgur Oasis. The cave can only be opened by helping Zaven the Alchemist fend off a few angry ghosts, after which he opens the cave and lets the player enter.