Standing strong
Château de Sully-sur-Loire, Center-Val de Loire, France (© StockPhotoAstur/Shutterstock)

Standing strong
Château de Sully-sur-Loire, Center-Val de Loire, France (© StockPhotoAstur/Shutterstock)

Holi color splash
Holi celebration in Jaipur, India (© powerofforever/Getty Images)

Holi color splash
Holi celebration in Jaipur, India (© powerofforever/Getty Images)

Pi in the sky
Dolmen of Sorginetxe, Basque Country, Álava, Spain (© David Herraez Calzada/plainpicture)

Pi in the sky
Dolmen of Sorginetxe, Basque Country, Álava, Spain (© David Herraez Calzada/plainpicture)

Friends, Romans, countrymen
The Temple of Saturn in the Roman Forum, Rome, Italy (© Nico De Pasquale Photography/Getty Images)

Friends, Romans, countrymen
The Temple of Saturn in the Roman Forum, Rome, Italy (© Nico De Pasquale Photography/Getty Images)

Back to black ... and white
Baby giant panda in the snow, China (© Cheryl Schneider/Alamy)

Back to black ... and white
Baby giant panda in the snow, China (© Cheryl Schneider/Alamy)

St. Patrick's enchantment
Samuel Beckett Bridge, Dublin, Ireland (© Colm Keating/Tandem Stills + Motion)

St. Patrick's enchantment
Samuel Beckett Bridge, Dublin, Ireland (© Colm Keating/Tandem Stills + Motion)

A vortex state of mind
Red rock formations, Sedona, Arizona (© Jim Ekstrand/Alamy)

A vortex state of mind
Red rock formations, Sedona, Arizona (© Jim Ekstrand/Alamy)

Umbrella maneuver
A black heron canopy feeding, Chobe National Park, Botswana (© Paul Souders/Minden Pictures)

Umbrella maneuver
A black heron canopy feeding, Chobe National Park, Botswana (© Paul Souders/Minden Pictures)

Spring awakening
Spring daffodils glowing in morning light (© LedyX/Shutterstock)

Spring awakening
Spring daffodils glowing in morning light (© LedyX/Shutterstock)

Long live the trees
Mist over a lowland rainforest, Danum Valley, Sabah, Borneo, Malaysia (© Nick Garbutt/Alamy)

Long live the trees
Mist over a lowland rainforest, Danum Valley, Sabah, Borneo, Malaysia (© Nick Garbutt/Alamy)

Wat-er wonderful world!
Water lilies at the surface of Cenote Nicte-Ha, Tulum, Mexico (© Franco Banfi/NPL/Minden Pictures)