American Visions

If you're looking for america, there's no need to buy a Greyhound bus ticket — just drop in at London's Hayward Gallery before mid-September. Photographers Ansel Adams and William Eggleston reveal the country's awe-inspiring natural phenomena, as well as the lurid traces of human occupation.

It is Adams' centenary year, and this collection of his work spanning 50 years was brought together by the San Francisco Museum of Modern Art to set him among the greats of the 20th century. He spent much of his life documenting the American wilderness, turning its craggy features into monumental images. Confronted by Thunderstorm...