The Danube is a river in Central Europe, the continent's second longest after the Volga. Classified as an international waterway, it originates in the town of Donaueschingen which is in the Black Forest of Germany...
Gothic architecture is a style of architecture that flourished during the high and late medieval period. It evolved from Romanesque architecture and was succeeded by Renaissance architecture. Originating in 12th century France and lasting into...
Buda Castle is the historical castle and palace complex of the Hungarian kings in Budapest, first completed in 1265. In the past, it was also called Royal Palace and Royal Castle. Buda Castle was built...
Marine is an adjective for things relating to the sea or ocean, such as marine biology, marine ecology and marine geology. As a noun it can be a term for a certain kind of navy,...
A nature reserve (natural reserve, nature preserve, natural preserve, bioreserve, or just preserve) is a protected area of importance for wildlife, flora, fauna or features of geological or other special interest, which is reserved and...
In nautical terminology, a reef is a rock, sandbar, or other feature lying beneath the surface of the water (six fathoms or less beneath low water). Many reefs result from abiotic processes—deposition of sand, wave...
This article is an introduction to underwater diving by humans. For other uses of the term diving, see dive (disambiguation) and diving Underwater diving is the practice of going underwater, either with breathing apparatus or...
Hummingbirds are birds that comprise the family Trochilidae. They are among the smallest of birds, most species measuring in the 7.5–13 cm ( ) range. Indeed, the smallest extant bird species is a hummingbird, the 5-cm Bee...
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