Visit the Petrified Forest National Park to see beautiful photographs of petrified wood and read explanations of how wood becomes rock. Also find photos of the Painted Desert and Blue Mesa.

A map from 1920 of southern Canada, the United States, and northern Mexico showing terrain features, lakes and river systems, and general vegetation types of the region. The map is keyed to show the submerged portion of the continental...

Features amazing 360 degrees interactive panoramas for students to help them better understand ecological variation on our planet. Searchable by biome/ecosystem type, location, or ecological phenomena they depict.

A map from 1916 of North America, Central America, Greenland, and the Caribbean to Puerto Rico showing the general distribution of vegetation types in the region. The map is color-coded to show natural vegetation in areas of ice desert,...

A map of Europe showing areas of different types of natural vegetation including tundra and alpine flora, coniferous forests, broadleaf forests and meadows, temperate grasslands, deserts, and oases.

A base map from 1898 of North America, Central America, Greenland, and the Caribbean to Puerto Rico showing the general distribution of vegetation types in the region, including areas of deserts, tundras, and ice fields, areas of grassy...

A map from 1901 of North America, Central America, Greenland, and the Caribbean to Puerto Rico showing the general vegetation regions. The map shows areas of deserts, tundras, and ice fields, areas of grassy lands, areas of open forests,...

A map from 1915 of Africa and Madagascar showing the general vegetation regions. The map is color-coded to show areas of forests, grasslands, steppes, poor steppes, and deserts.

A color relief map of the African continent showing regional vegetation and terrain including lands below sea level, grasslands, temperate and tropical forests, oases, semideserts, and deserts and barren mountain slopes. The map also...

A map of Asia from 1899 showing the primary agricultural production regions of Asia. This map is keyed to show the Northern Plain - region of forests (I), Central Asia - steppes and deserts (II), Mediterranean region - fruits, cereals,...

A color-relief map from 1920 of Asia showing the principal landform and vegetation features, river systems, and water features of the region. The map is keyed to show areas of waters less than 500 feet deep, floating ice, lands below sea...

A map from 1920 of Utah showing the capital at Salt Lake City, counties and county seats, principal cities and towns, Indian reservations, forest reserves, military reservations, railroads, mountains, lakes, rivers, and the Great Salt...

A map from 1911 of North America, Central America, Greenland, and the Caribbean to Puerto Rico showing the areas of primary vegetation types for the region. The map is color-coded to show areas of forests, areas of woodland, grass, and...

A map from 1920 of Utah showing the capital at Salt Lake City, counties and county seats, principal cities and towns, Indian reservations, forest reserves, military reservations, railroads, mountains, lakes, rivers, and the Great Salt...

This site coincides with the area of the Putoransky State Nature Reserve, and is located in the central part of the Putorana Plateau in northern Central Siberia. It is situated about 100 km north of the Arctic Circle. The part of the...

A map from 1911 of South America showing the distribution of vegetation types. The map is color-coded to show regions of forests, regions of woodlands, grass, and cultivation, regions of steppes and prairies, desert regions, and regions...