Cloughoughter Castle in Lough Oughter, County Cavan, Ireland (© 4H4 PH/Shutterstock)

Bear Hole Brook, Catskill Mountains, New York (© GummyBone/Getty Images)

Castelmezzano, Italy (© Rudy Balasko/Shutterstock)

Blacktip reef sharks, Maldives (© Filippo Bacci/Getty Images)

Zhangye Danxia National Geopark, Gansu province, China (© TONNAJA/Getty Images)

Sand bar in Nakupenda Beach Nature Reserve, Zanzibar, Tanzania (© Lubos Paukeje/Alamy)

Hong Kong SAR (© leungchopan/Getty Images)

Field of lavender, Somerset, England (© Doug Chinnery/Getty Images)

Moselle River loop, Kröv, Germany (© Jorg Greuel/Getty Images)

Mildred B. Cooper Memorial Chapel, Bella Vista, Arkansas (© Eddie Brady/Getty Images)