Ascending from the floor of Majlis al Jinn, Oman
Majlis al Jinn, ascending towards the Cheryl's Drop / Wikimedia Commons, CC-BY-SA-3.0

Weird places

Majlis al Jinn - Khoshilat Maqandeli cave, Oman

6 August 2010

One of natural wonders of Oman is the giant underground chamber - Majlis al Jinn or Khoshilat Maqandeli. This cave represents a sinkhole in early stage of development - giant underground chamber with small opening above it.

7 Most Recent Landmarks

Currently described 566 landmarks
  • Daikoku Sulphur Cauldron, Northern Marianas

    Daikoku Sulfur Cauldron, Northern Mariana Islands

    May 7, 2017

    Earlier people thought that lakes of liquid sulfur are found only in outer space, not on Earth. Since the 2005 - 2006 some are known also on Earth - in deep seas. Most impressive of these sulfur lakes is Daikoku Sulfur Cauldron.

  • Usterling Growing Rock, Germany

    Usterling Growing Rock, Germany

    May 2, 2017

    Sometimes humans can help the nature in creation of its wonders and Usterling Growing Rock in Bavaria is one of such cases. Thanks to centuries long effort there has developed a highly unusual formation - natural, up to 5.4 m tall stone wall with stream flowing along its upper rim

  • Blood Falls flow into Lake Bonney, Antarctica

    Lake Bonney, Antarctica

    April 17, 2017

    McMurdo Dry Valleys in Antarctica are rich with very unusual landmarks - almost everything in this extreme environment is unique. Lake Bonney - one of the few liquid lakes in Antarctica - is one of such unusual landmarks. Nowhere else on Earth there is known a natural place where the "laughing gas" - nitrous oxide - is found in such high concentration.

  • Giant Forest, United States

    Giant Forest, United States

    April 15, 2017

    Western side of Sierra Nevada mountains in California has some of the most unusual ecosystems in the world: forests of giant sequoias - world' s largest trees. Most prominent of these groves is Giant Forest.

  • Multnomah Falls, United States

    Multnomah Falls, United States

    April 8, 2017

    There are numerous waterfalls in Oregon but one stands out - the gorgeous Multnomah Falls.

    This waterfall is very tall - the tallest cascade falls uninterrupted for 165 m but several more factors make this waterfall special: such as the scenic pedestrian bridge between two drops of the falls and the easy accessibility from the highway.

  • The blue fire of Kawah Ijen, Indonesia

    Kawah Ijen, Indonesia

    February 6, 2017

    One of the most unusual volcanoes on the world is Kawah Ijen. It contains the largest lake of acid in the world but especially impressive are the eerie blue flames around the solfataras in the crater - an unforgettable sight in the night.

  • St. Magnus Cathedral in Kirkwall, Scotland

    St. Magnus Cathedral in Kirkwall, United Kingdom

    January 8, 2017

    Northernmost cathedral in British Isles is St. Magnus Cathedral in Kirkwall. This is one of the best examples of Norman architecture, a great example of high quality construction in these times.

Hot books

Sapiens: A Brief History of Humankind

Yuval Noah Harari has some questions. Among the biggest: How did Homo sapiens (or Homo sapiens sapiens, if you’re feeling especially wise today) evolve from an unexceptional savannah-dwelling primate to become the dominant force on the planet, emerging as the lone survivor out of six distinct, competing hominid species? He also has some answers, and they’re not what you’d expect...

The Lost City of the Monkey God: A True Story

Since the days of conquistador Hernán Cortés, rumors have circulated about a lost city of immense wealth hidden somewhere in the Honduran interior, called the White City or the Lost City of the Monkey God. Indigenous tribes speak of ancestors who fled there to escape the Spanish invaders, and they warn that anyone who enters this sacred city will fall ill and die...

Map of the described landmarks

This map shows the described landmarks. Red dots are architecture monuments, pink - archaeological, blue - geological and meteorological, green - biological. You may find the large map to be easier to use!

Latest articles


Jellyfish Lake, Palau
Eerie reality in Jellyfish Lake / , Flickr / CC BY 2.0

Lakes, bays and streams

April 6, 2017

There are many factors which can make lakes, sea bays or rivers unusual. Some of the most unusual are diverse volcanic crater lakes, lava lakes, lakes in sinkholes, many lakes in deserts and also in... Antarctica.

Mount Cleveland, Alaska


January 24, 2017

The mission of Wondermondo is to describe all the unusual places ("wonders") around the world. Each of the 1,500 active volcanoes and also some of the inactive ones are such unusual places. But, as always in life, some are more unusual than others.

Arve Big Tree, Tasmania, Australia

Tree species which exceed the height of 80 m (update!)

December 27, 2016

The tallest trees of the world are several species of conifers and also eucalypts.

Convincing world record nowadays belongs to coast redwood (Sequoia sempervirens (D. Don) Endl.). Many hundreds of these trees surpass the height of the second highest tree species in the world.