A sans serif font by Jos Buivenga (exljbris.com). With its perfectly round o and almost circular bowls, Museo Sans has some geometric elements. On the other hand, its double-decker g and soft foot terminal on the l feel humanist. I categorize it as a geometric sans serif font, because when text set in Museo Sans 500 is compared to a range of sans serif fonts it feels more geometric than humanist. Museo Sans 500 has a slightly smaller x-height than Verdana.
The Museo Sans family has 10 fonts (various styles, weights). All are available for web licensing at fontspring.com. In the font specimen sheet, I show only Museo Sans 500 and Museo Sans 500 italic, which are free fonts. I combine them with Museo 700, a bold font from a different family, but a family with a similar structure. The full family is also available via typekit.