Palo santo is a sacred tree native to South America. Indigenous Latin American cultures have used its wood in traditional healing and spiritual ceremonies for centuries. A cousin of both frankincense and myrrh, palo santo literally means "holy wood," and it's a fitting name given its past. When it burns, the aromatic wood releases lemon, mint, and pine notes—an invigorating, grounding fragrance that is believed to have a number of benefits.