On the western side of Mount Hood lies the longest glacier cave system in the contiguous United States. In 2012, these caves were mapped to a combined length of 7,166.8 feet by cave explorers Brent McGregor and Eddy Cartaya. Currently, the total passage length is hundreds of feet less. Glaciers are frozen rivers; they are always moving and changing... (Photo and caption by Josh Hydeman)

The Spirit of Ecstasy, also called “Emily”, “Silver Lady” or “Flying Lady,” was designed by English sculptor Charles Robinson Sykes and carries with her a story about a secret passion between John Walter Edward Douglas-Scott-Montagu (second Lord Montagu of Beaulieu after 1905, a pioneer of the automobile movement, and editor of The Car Illustrated magazine) and his love and the model for the emblem, his secretary Eleanor Velasco Thornton. Photo: Worker Ronald Little displays a finished “Spirit of Ecstasy”. (Photo by Stefan Wermuth/Reuters)

A hiker admires the view as Mt. Etna, Europe's largest active volcano, erupts in the background, in the Bove Valley of Etna Park, on the eastern slope of Mt. Etna, in Sicily, southern Italy, Sunday, July 4, 2021. Since Feb. 16, 2021, Mt. Etna has begun a series of eruptive episodes. (Photo by Salvatore Allegra/AP Photo)

Lindsay Heimbach goes airborne while sledding down a hill on Mt. Lemmon December 27, 2008. (Photo by James Gregg/Arizona Daily Star)

In this photo taken on Saturday, November 16, 2013, Mt. Etna, Europe's most active volcano, spews lava during an eruption as seen from Acireale, near the Sicilian town of Catania, Italy. (Photo by Carmelo Imbesi/AP Photo)

Hooded penitents from “La Borriquita” brotherhood take part during a Holy Week procession in Cordoba, Spain, Sunday, March 29, 2015. Hundreds of processions take place throughout Spain during the Easter Holy Week. (Photo by Manu Fernandez/AP Photo)

Lava erupts from a crater of Mt. Etna, Europe's largest active volcano, behind Santa Maria della Guardia church in Belpasso, near Catania, in southern Italian island of Sicily, early Friday, June 18, 2021. Since Feb. 16, 2021, Mt. Etna has begun a series of spectacular eruptive episodes. (Photo by Salvatore Allegra/AP Photo)

A cake decorated as a scene from the children's story “Little Red Riding Hood” is displayed at the Cake and Bake show in London, Britain October 3, 2015. (Photo by Neil Hall/Reuters)