But none of those things caught Sabine Rovers' eye during a visit to a homeopathic doctor in the Netherlands. Instead, she found herself drawn to the geeky gear crammed into every corner. "It felt like I stepped onto a film set with lots of sci-fi apparatuses I didn't know anything about," she says.

Rovers explores this surprising tech in Natural Healing. At first glance, her sun-drenched photos appear to show just another doctor's office, but a closer look reveals equipment that some believe measures the body's energy or detects sickness through the iris of the eye. "I'm not a scientist, and I don't know if it's right or wrong," she says. "But I think it's fascinating."

Some 1 million people in the Netherlands—about 6 percent of the population—seek treatment through alternative medicine each year.