Australia, Queensland, Brisbane, detail of the University Library building exterior.

Australia, Queensland, Brisbane, detail of the University Library building exterior.

USA, Arizona, Monument Valley, Hot air balloons during Balloon Festival in the Navajo Tribal Park. In the forground at left is the Thumb.

USA, Arizona, Monument Valley, A hot air balloon flying over the red sand dunes at Sand Springs during Balloon Festival in the Navajo Tribal Park.

USA, Arizona, Monument Valley, Three hot air balloons during Balloon Festival in the Navajo Tribal Park. The Three Sisters are at right.

USA, Arizona, Monument Valley, Two hot air balloons fly during Valley Balloon Festival in the Navajo Tribal Park.

USA, Arizona, Monumnet Valley, Hot air balloons during Balloon Festival fly over Camel Butte in the Navajo Tribal Park. The Three Sisters are at left.

USA, Arizona, Monumnet Valley, Hot air balloons during Balloon Festival fly over Camel Butte in the Navajo Tribal Park. The Three Sisters are at left.

USA, Arizona, Monumnet Valley, Hot air balloons during Balloon Festival fly over Camel Butte in the Navajo Tribal Park. The Three Sisters are at left.

USA, Arizona, Monument Valley, A hot air balloon flying over the West Mitten during the Balloon Festival in the Navajo Tribal Park in Arizona.

USA, Arizona, Monument Valley, A hot air balloon flying over the West Mitten during the Balloon Festival in the Navajo Tribal Park in Arizona.

USA, Arizona, Monument Valley, Two hot air balloons fly in front of the Three Sisters in the Monument Valley Balloon Festival in Navajo Tribal Park.

USA, Arizona, Monument Valley, Hot air balloons in the Monument Valley Balloon Festival in the Navajo Tribal Park. In the forground is a dead juniper snag.

Guyana, Demerara-Mahaica Region, Georgetown, Silk Cotton or Kapok tree, Ceiba pentandra, in the Botanical Gardens. In the foreground are lotus plants.