Numerous helicopter companies (most based in Lihu'e) offer up-in-the-air jaunts over waterfall-striped Mt Wai'ale'ale, the island's central shield volcano and one of the wettest spots on Earth, and the sheer-hewn sea cliffs of the Na Pali coast, accessible otherwise only by ocean kayak.
"We really wanted to go in, " says Ethan Kinsey, a tour operator from Tanzania who was in one of the first overnight volcano treks.
The magnificently situated Rancho las Hamacas in San Jacinto, northwest Nicaragua, overlooks the natural bubbling mud pools of Hervideros de San Jacinto, where you can camp for the night before climbing the smoking Volcano Telica, one of the country's 12 fumingly active Maribios volcanoes.
Mt Cotopaxi is the highest active volcano in Ecuador and one of the highest in the world.
To start with, nearly all the sailing was done while we slept, giving us maximum time ashore to explore the likes of the 10, 023ft Haleakala, a one-time monster of a volcano but now a stunning, sterile ruin.
Mystics, too, have flocked to the volcano, claiming it as one of the planet's seven sources of spiritual energy.
An eruption by the volcano in 1956 was "one of the three most significant volcanic events on the globe this century".
At that point, one hopes, humanity will have developed some volcano-squelching technology that may render the problem moot, or have moved to cloud cities or Mars.
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The 2, 869-meter-tall volcano, which last erupted in May, is one of the most active in Kamchatka, the agency said.
The volcano strikes an ominous presence on the horizon - one of countless sleeping giants in Iceland that might one day stir, sending torrents of fire, rock and ash raining down.
The kit, myself and Steve, plus camera man and climbing expert all needed to get down into the volcano, set up the final laser scan and get out in one piece.
His death marks the end of the purebred Pinta Island tortoise, but there is hope that they will survive in some form: at least one first-generation descendant of the subspecies has been found at the Wolf volcano on neighboring Isabela Island.
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In 1958, he found the concentration at the top of the volcano to be around 315ppm (that is 315 molecules of CO2 for every one million molecules in the air).
Ms Mather created the volcano, which uses LEDs and a small text display to explain what happens when one erupts, for a school geography project (for which she won a commendation).
But the volcano's proximity and its vivid colors are worth braving the rough terrain for, according to one of the first people to visit the area.
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