nature

<n>Your glacial expectations</n> (2012), an installation by artist <n>Olafur Eliasson</n> for <n>Kvadrat</n>.

<n>Irish Sky Garden</n>, a 1992 <n>Land art</n> installation by <n>James Turrell</n> at Liss Ard Estate, Ireland.

<n>Lily of the valley</n>, the birth flower for May, photographed by <n>swallowtail garden seeds</n>.

<n>Tegalalang Rice Terrace</n> in Bali, Indonesia.

An image from <n>Peg Streep</n>'s 1999 book, <n>Spiritual Gardening</n>.

<n>Fyrkat</n>, a Viking ring castle from 980 AD near Hobro, Denmark. Photographed by <n>Ted Spiegel</n> in April 1970.

The <n>Kerid Crater</n> in Iceland, where the sky's reflection creates an optical illusion.

The <n>Fyrkat</n> Viking ring castle in Denmark, photographed by <n>Ted Spiegel</n> for <n>National Geographic</n> in 1970.

The <n>Initiation Well</n> at the <n>Quinta da Regaleira</n> estate in Sintra, Portugal.

The patio at the <n>Zen Day Spa of Fort Erie</n> in Fort Erie, Canada.