Huanglong Valley

Travertine pools in Huanglong Valley, China

Possibly the largest travertine terraces in the world, they extend for 3.6 kilometers and are deposited by mildly thermal springs.

Hammam Meskhoutine (Hammam Meskoutine)

Travertine formations of Hammam Meskhoutine, Algeria

Group of hot springs that have formed giant travertine terraces. The discharge of the hottest spring (98° C) is 1650 l/min. Used for bathing since Roman times.

Blakitnaja Krynica (Blue Well)

Blakitnaja Krynica

Powerful, picturesque spring, considered to be the most powerful spring in East European Plain. Output – around 60 l/s. Site of legends, sacred place.

North-West Eifuku Champagne Vent

Eifuku Champagne Vent emitting bubbles of liquid carbon dioxide, Northern Marianas

A submarine vent on a volcano that emits almost pure liquid carbon dioxide at 1,600 m depth. Such phenomenon is known in three places on Earth and at Eifuku it is most abundant.

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.

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, […]

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.

Blood Falls, Antarctica

Blood Falls from above, Antarctica

Unusual natural feature – an outflow of hypersaline water, seeping through the ice, tainted with iron oxides in blood color. This approximately 15 m tall fall provides insight into a unique ecosystem that has been isolated from the outside world for 1.5 million years.