Lone Pine Tree

The Lone Pine Tree a huge tree located in an arboreous area with a quartet of Kiriko live in a cabin below.

Overview
Another pre-exam trial is held at this location that tests the examinees in many facets.

Hunter Exam arc
Following the tip given by the Captain and the Quizzing Lady; the Hunter hopefuls Gon, Kurapika, and Leorio follow a path into a forest that leads them to a log cabin where the Lone Pine Tree stands. In that cabin, a husband is attacked and wounded while his wife is taken hostage by a Kiriko. This turn of events is eventually solved and it's revealed that the husband and wife were the son and daughter, to the one Kiriko they encountered in the log cabin and the other one that tried to attack Gon in the forest was the father and mother respectively. They pass the trio and take them to the Hunter Exam site.

Greed Island arc
After registering for the exam, Killua plans to head to the Lone Pine Tree as, Gon suggested, however, he would first take a shower. That night he manages to reach his destination and the Kiriko recognize Gon's scent on Killua, although, he took a shower before hand. So to kill time, Killua tells the Kiriko about his adventures with Gon up to that point.