Spend a night or two in Hilo, taking time to day-hike on Mauna Kea or to drive partway up the mountain for stargazing after dark.

BBC: How to choose a Hawaiian island

The siblings claimed Siverls died of heat exhaustion during an endurance hike up a mountain in 90-degree weather with virtually no food or water and wearing a backpack filled with 40 pounds of rocks.

FORBES: On the Docket

In summer months, it is possible to hike to the peak of Qornet as-Sawda, Lebanon's highest mountain.

BBC: Lebanon in a week: The ultimate road-trip guide