Sinkhole divers. Some of the most spectacular are the Zacatón cenote in Mexico (the world's deepest water-filled sinkhole), the Boesmansgat sinkhole in South Africa, Sarisariñama tepuy in Venezuela, the Sótano del Barro in Mexico, and in the town of Mount Gambier, South Australia. Sinkholes that form in coral reefs and islands that collapse to enormous depths are known as blue holes and often become popular diving spots. Large and visually unusual sinkholes have been well-known to local people since ancient times. Nowadays sinkholes are grouped and named in site-specific or generic names. Some examples of such names are listed below. The
Into the Void (Black Sabbath song) Into the Void (Black Sabbath song) "Into the Void" is a song by Black Sabbath, released in 1971 on their album, "Master of Reality". An early version of "Into the Void" called "Spanish Sid" was released on the deluxe edition of "Master of Reality". It is written in the key of C# minor. Various artists have covered the song, including Soundgarden, Kyuss, Monster Magnet, Melvins, Sleep, Dr. Know, Cavity, Exhorder, Lumsk, Dimmi Argus and Orange Goblin. In Soundgarden's version, the original lyrics are replaced by words of protest by Chief Seattle, which fit the metre of the song. At the