Sometimes people read some verses in Ester and other books in a different cantillation. For example, in Ester, some read the verse of "אשר הגלה מירושלים" to the tune of Eichah, and the Mishnah Brurah ...
The Shabbos before Tisha B'Av gets a very sad Haftorah, known as Chazon. It's Isaiah 1:1--27. (I recommend you open the text in a new window, or else the answers to this question will make no ...