Syri i Kalter (Blue Eye)

Syri i Kalter, Albania

The most powerful spring in the country, it is a dark blue natural pool that discharges 6,000 l/s from more than 50 meters down.

Kefrida Falls

Kefrida Falls, Algeria

Some 44 m tall waterfall, lowest of three major waterfalls on Kefrida stream.

Ventas Rumba (Venta Rapids)

Ventas Rumba, Latvia - widest waterfall in Europe

Widest and most impressive waterfall in Latvia. The width of this 1.6 – 2 m high waterfall is 270 – 275 m.

North-Western solfatara field of Shiashkotan

Sinarka volcano on Shiashkotan Island. North-Western solfatara field is in the central part of image, partly obscured with clouds

An interesting geothermal field where in 2007 was discovered a geyser-like spring named "Chornij Drakon" (Black Dragon). Here is located also a spouter "Geizernij" that on a regular basis spurts 1 – 1.5 m high jet of gas and water.

Spring tufa, travertine and other formations

Travertine pools in Huanglong Valley, China

Wondermondo 🢖 Categories of wonders 🢖 Geological wonders 🢖 Springs 🢖 Spring tufa, travertine, and other formations Category Spring tufa, travertine, and other formations Described spring tufa, travertine and other formations What is included in this category? This category includes very diverse landmarks which have one thing in common: all of them are created by springs that are depositing chemical sediments – silica, […]

Gorham’s Cave

Entrance in Gorham's Cave, Gibraltar - the last refuge of Neanderthals

One of four caves in Gorham’s Cave complex. Cave has formed in Jurassic limestone and has an 18 m thick layer of sediments that contain very important finds including the latest find of Neanderthals who lived here 60 – 24 thousand years ago when the sea was far away from the cave and the area was rich with resources. This is the last known settlement of Neanderthals in the world. The time of their habitation includes an incision of eight lines, made at least 39,000 years ago, most likely made by Neanderthals – the oldest known abstract drawing in the world. 23 thousand years ago here started to live modern humans, who left some paintings on the walls of the cave. Phoenicians and Carthaginians used this cave as their shrine, leaving offerings here.

Bala’a sinkhole (Baatara sinkhole) and waterfall

Bala'a sinkhole, Lebanon

Approximately 255 m deep, nearly vertical cave with waterfall in it. The entrance in the cave is some 70 m deep sinkhole. Here waterfall has percolated one side of sinkhole, creating three natural bridges one above the other. Waterfall disappears underground.

Rabbitkettle Tufa Mounds

Rabbitkettle Tufa Mounds from above

Two tufa and travertine mounds, the largest is 27 m high and 79 m wide. These mounds have been formed by warm thermal springs (21°C) and consist of numerous smaller rimstone pools.