Eucalyptus trees, Megalong Valley, Blue Mountains National Park, NSW, Australia (© Andrew Peacock/TANDEM Stills + Motion)

Southern yellow-billed hornbills in Kruger National Park, South Africa (© Richard Du Toit/Minden Pictures)

Interior of the Charminar, Hyderabad, Telangana (© Richard I'Anson/Getty Images)

Aerial view of Khao Sok National Park, Surat Thani, Thailand (© Peetatham Kongkapech/Getty Images)

Desert bighorn sheep in Valley of Fire State Park, Nevada, United States (© Rachid Dahnoun/Cavan Images)

Plum blossoms, China (© zhikun sun/Getty Images)

Sunrise at the summit of Kedarkantha (© Jeet Khagram/500px/Getty Images)

A lion sleeping in Ishasha Sector, Queen Elizabeth National Park, Uganda (© Gunter Nuyts/Getty Images)

Broken Beach in Nusa Penida, Bali, Indonesia (© joakimbkk/Getty Images)

Château de Sully-sur-Loire, Centre-Val de Loire, France (© StockPhotoAstur/Shutterstock)

Marine iguanas, Galápagos Islands, Ecuador (© helovi/Getty Images)

Lathmar Holi in Nandgaon and Barsana, Uttar Pradesh (© Idris Ahmed/Alamy Stock Photo)

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

Baby giant panda in the snow, China (© Cheryl Schneider/Alamy Stock Photo)

Samuel Beckett Bridge, Dublin, Ireland (© Colm Keating/Tandem Stills + Motion)

Red rock formations, Sedona, Arizona, United States (© Jim Ekstrand/Alamy Stock Photo)

Black heron canopy hunting, Chobe National Park, Botswana (© Paul Souders/Minden PIctures)

Spring daffodils glow in the morning (© LedyX/Shutterstock)

Mist over lowland rainforest, Danum Valley, Sabah, Borneo, Malaysia (© Nick Garbutt/Alamy)

Nalanda mahavihara, Bihar (© bambam kumar jha/Getty Images)

Lightning and storm clouds at sunset near Bowman, Nebraska, United States (© john finney photography/Getty Images)

Desert elephant with calf feeding on tall grass, Namibia (© Christophe Courteau/Minden Pictures)

Hobbit-hole in Hobbiton Movie Set, Waikato, New Zealand (© Kim Petersen/Alamy)

Manatee in Crystal River, Florida, United States (© Stephen Frink/Getty Images)

Odeon of Herodes Atticus theatre, Acropolis of Athens, Greece (© f11photo/Getty Images)

Female black-naped monarch nesting (© komkrit tonusin/Alamy)

Superbloom in Carrizo Plain National Monument, California, United States (© Robb Hirsch/TANDEM Stills + Motion)

Aerial view of Sydney Harbour, New South Wales, Australia (© jamenpercy/Getty Images)

Ostuni at dusk, Apulia, Italy (© Feng Wei Photography/Getty Images)

Tree frog, Costa Rica (© Ondrej Prosicky/Shutterstock)