April 2021, day by day.

Lençóis Maranhenses National Park in Barreirinhas, Brazil (© WIN-Initiative/Getty Images)

2021-04-01

Lighthouse at Cape Aniva, Sakhalin Island, Russia (© Amazing Aerial Agency/Offset by Shutterstock)

2021-04-02

An Ostereierbaum (Easter egg tree) in Saalfeld, Germany (© Rudi Sebastian/Alamy)

2021-04-03

Saut du Brot stone bridge in the Areuse Gorge, Neuchâtel, Switzerland (© Andreas Gerth/eStock Photo)

2021-04-04

The Parthenon temple in the Acropolis of Athens, Greece (© Lucky-photographer/Shutterstock)

2021-04-05

Amboli Waterfalls in Maharashtra, India (© ePhotocorp/iStock/Getty Images Plus)

2021-04-06

Willow branches in early spring, Minnesota (© Jim Brandenburg/Minden Pictures)

2021-04-07

Étretat, Normandy, France (© StevanZZ/Alamy)

2021-04-07

Black grouse male calling at lek site in Kuusamo, Finland (© Oliver Smart/Alamy)

2021-04-07

Square Tower Group in Hovenweep National Monument, Utah (© Brad McGinley Photography/Getty Images)

2021-04-08

Grizzly bear cub siblings playing in Denali National Park, Alaska (© Ron Niebrugge/Alamy)

2021-04-09

Mount Yoshino, Nara Prefecture, Japan (© Sean Pavone/iStock/Getty Images Plus)

2021-04-10

Cherry blossoms in Queen Elizabeth Park in Vancouver, B.C. (© Harris Hui/Getty Images)

2021-04-11

Earth from the International Space Station, photographed by astronaut Jeff Williams (© Jeff Williams/NASA)

2021-04-11

Sunset at Golden Temple in Amritsar, India (© szefei/shutterstock)

2021-04-12

Wat Phra Si Sanphet, Ayutthaya Historical Park, UNESCO World Heritage Site, Ayutthaya, Thailand (© travelstock44/Alamy)

2021-04-13

Wildflowers in the Carrizo Plain National Monument, California (© Dennis Frates/Alamy)

2021-04-13

Tree trunks in Abraham Lake, Alberta (© Coolbiere/Getty Images)

2021-04-15

Jackie Robinson signs autographs at spring training in Ciudad Trujillo, now Santo Domingo, Dominican Republic, on March 6, 1948 (© Bettmann/Getty Images)

2021-04-15

Dalí Theatre-Museum in Figueres, Spain (© Valerija Polakovska/Shutterstock)

2021-04-15

Dinan, Brittany, France (© Scott Wilson/Alamy)

2021-04-16

New River Gorge Bridge in the New River Gorge National Park and Preserve, West Virginia (© Entropy Workshop/iStock/Getty Images Plus)

2021-04-16

Montalbano Elicona, Messina, Sicily, Italy (© Antonino Bartuccio/SOPA Collection/Offset by Shutterstock)

2021-04-17

Large school of Munk's pygmy devil rays from the air, Gulf of California, Mexico (© Mark Carwardine/Minden Pictures)

2021-04-18

Tegalalang Rice Terraces, Ubud, Bali, Indonesia (© Michele Falzone/Alamy)

2021-04-19

Ancient ruins of Hazara Rama Temple in Hampi, Karnataka (© Dmytro Gilitukha/shutterstock)

2021-04-20

The north coast of Madeira, Portugal (© Hemis/Alamy)

2021-04-21

Mississippi River on the border between Arkansas and Mississippi (© NASA)

2021-04-21

Casa Batlló in Barcelona, Catalonia, Spain (© Marco Arduino/Sime/eStock Photo)

2021-04-22

Fairy Glen, Betws-y-Coed, Wales, United Kingdom (© Robert Harding World Imagery/Offset by Shutterstock)

2021-04-23

The Cholla Cactus Garden in Joshua Tree National Park, California (© Bryan Jolley/Tandem Stills + Motion)

2021-04-23

Mist rises over the forest in Banff National Park, Alberta (© Pgiam/Getty Images)

2021-04-24

Adélie penguins diving off an iceberg in Antarctica (© Mike Hill/Getty Images)

2021-04-24

Great Hornbill spotted in West Bengal, India (© Debapratim Saha/Minden Pictures)

2021-04-25

Wensleydale, Yorkshire Dales National Park, North Yorkshire, England (© Guy Edwardes/Minden Pictures)

2021-04-26

Yayoi Kusama's 'Pumpkin' artwork on Naoshima Island, Japan, in August 2018 (© WireStock/Alamy)

2021-04-26

Prairie crocus, Sandilands Provincial Forest, Manitoba, Canada (© Jaynes Gallery/Danita Delimont)

2021-04-27

Northern gannets on Great Saltee Island, Ireland (© Danny Green/Minden Pictures)

2021-04-27

Aerial view of tidal channels in marshland of the Mockhorn Island State Wildlife Management Area, Virginia (© Shane Gross/Minden Pictures)

2021-04-28

'The Spirit of Harlem' mural by Louis Delsarte in Harlem, New York City (© Pietro Scozzari/agefotostock)

2021-04-29

Mont-Saint-Michel, Normandy, France (© Mathieu Rivrin/Getty Images)

2021-04-30

Thoseghar Waterfalls in Maharashtra, India (© Sonali Kumar/iStock/Getty Images Plus)

2021-04-30