
Earth and nature
Caldera
A volcanic depression formed when the ground above a magma reservoir collapses, often following a major eruption.

The wonder encyclopaedia
A small amount of understanding can transform what you notice. These illustrated explanations connect an idea with real places across the collections.

Earth and nature
A volcanic depression formed when the ground above a magma reservoir collapses, often following a major eruption.

Earth and nature
A landscape shaped by the dissolution of soluble rock, often with caves, sinkholes, springs and underground drainage.

Earth and nature
A valley whose form has been substantially altered by moving ice and the rock carried within it.

Earth and nature
Zones where the Earth's moving tectonic plates meet, separate or slide past one another.

Earth and nature
A volcano's shape reflects the materials, eruptions and later erosion that built and altered it.

Art and architecture
An image or pattern assembled from small pieces of material, often called tesserae.

Art and architecture
Building with carefully placed stone without relying on mortar to bind the stones together.

Heritage
A landscape whose character and significance arise from the interaction of people and their environment.

Heritage
The term UNESCO uses for heritage significance considered exceptional beyond national boundaries.

Heritage
A World Heritage property made up of multiple components that together express its significance.

Heritage
Traditions, knowledge and practices maintained and transmitted by communities.

Heritage
The buildings, landscapes, machinery and human stories associated with systems of production and work.

History
Distinguishing what survives, what has been reconstructed and what interpretation proposes.

Cities and routes
A way of reading a city through its relationship with water, crossings, trade and flood-prone ground.

Maps and photography
Treating a map as evidence of a maker's knowledge, purpose and perspective at a particular time.

Maps and photography
Looking at framing, light, viewpoint and omissions as well as the place depicted.