Late afternoon light on Horsetail Falls, a phenomenon which occurs only one or two days a year in late February due to the angle of the sun and snow melt on the cliffs, Yosemite Valley, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Late afternoon light on Horsetail Falls, a phenomenon which occurs only one or two days a year in late February due to the angle of the sun and snow melt on the cliffs, Yosemite Valley, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Afternoon light on Horsetail Falls, a phenomenon that occurs once or twice a year in late February due to the angle of the sun and snow melt on the cliffs, Yosemite Valley, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Afternoon light on Horsetail Falls, an occurence that happens once or twice a year in late February due to the angle of the sun and snow melt on the cliffs, Yosemite Valley, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Wood horsetail (Equisetum sylvaticum) in a Norwegian forest, Skibotn, Lapland, Norway, Scandinavia, Europe

Detail of Horsetail Falls, near Valdez, Alaska, United States of America, North America

Giant horsetail (Equisetum telmateia) growing in damp woodland, Wiltshire, England, United Kingdom, Europe

Horsetail Falls in Yosemite National Park, Yosemite, California, United States

Hiker behind Ponytail Falls (aka Upper Horsetail Falls), Columbia River Gorge National Scenic Area, Oregon.

Chapel, Christmas tree near Elmau, Upper Bavaria, Bavaria, Germany, Europe

Chapel, Christmas tree near Elmau, Upper Bavaria, Bavaria, Germany, Europe

Wooded Landscape with horsetail or snake-grass, Rondane National Park, Norway, Europe

Wooded Landscape with horsetail or snake-grass, Rondane National Park, Norway, Europe

Chapel, Christmas tree near Elmau, Upper Bavaria, Bavaria, Germany, Europe

Horsetail Falls, Columbia River Gorge National Scenic Area, Oregon, Usa

Yosemite Firefall at Horsetail Fall in Yosemite Valley, Yosemite National Park, California, United States of America

Ponytail Falls, Columbia River Gorge National Scenic Area, Oregon, Usa

Insects, Butterfly, Barred Horsetail, Close up of Butterfly on Equisetum Japonicum.

Light Micrograph (LM) of a transverse section of a stem of a Horsetail Fern (Equisetum sp.)