The rise of tufa
Tufa formations in Mono Lake, California (© Susanna Patras/TANDEM Stills + Motion)

Happy birthday, Finland!
Old Town in Helsinki, Finland (© Oleksiy Mark/Shutterstock)

Happy birthday, Finland!
Old Town in Helsinki, Finland (© Oleksiy Mark/Shutterstock)

Remembering Pearl Harbor
Pearl Harbor Memorial Bridge, New Haven, Connecticut (© Enzo Figueres/Getty Images)

Remembering Pearl Harbor
Pearl Harbor Memorial Bridge, New Haven, Connecticut (© Enzo Figueres/Getty Images)

The comeback of Notre-Dame
Notre-Dame Cathedral, Paris, France (© Julien Fromentin/Getty Images)

The comeback of Notre-Dame
Notre-Dame Cathedral, Paris, France (© Julien Fromentin/Getty Images)

Attitude and altitude
Guanacos, Torres del Paine National Park, Chile (© Floris van Breugel/NPL/Minden Pictures)

Attitude and altitude
Guanacos, Torres del Paine National Park, Chile (© Floris van Breugel/NPL/Minden Pictures)

The end? Not quite.
The Cornish Coast Path covered in snow, Land's End, Cornwall, England (© Josef FitzGerald-Patrick/Getty Images)

The end? Not quite.
The Cornish Coast Path covered in snow, Land's End, Cornwall, England (© Josef FitzGerald-Patrick/Getty Images)

The triumphant trio
Tre Cime di Lavaredo, Sexten Dolomites, Italy (© Daniel Maran/Getty Images)

The triumphant trio
Tre Cime di Lavaredo, Sexten Dolomites, Italy (© Daniel Maran/Getty Images)

'Red-y' for the holidays
Wild poinsettia (aka Christmas flower) (© David Hosking/NPL/Minden Pictures)

'Red-y' for the holidays
Wild poinsettia (aka Christmas flower) (© David Hosking/NPL/Minden Pictures)

Advent at the basilica
Christmas market, St. Stephen's Basilica, Budapest, Hungary (© Calin Stan/Shutterstock)

Advent at the basilica
Christmas market, St. Stephen's Basilica, Budapest, Hungary (© Calin Stan/Shutterstock)

'Hoo' said that?
Northern hawk-owl, Canada (© pchoui/Getty Images)

'Hoo' said that?
Northern hawk-owl, Canada (© pchoui/Getty Images)

A lake of tears
Lake Misurina, Dolomites, Italy (© Marco Bottigelli/Getty Images)

A lake of tears
Lake Misurina, Dolomites, Italy (© Marco Bottigelli/Getty Images)