“He studied speleology and wrote a book on the work and life of Karel Absolon, discoverer of the Punkva caves near Brno.”

“The cave can be visited from March till October. It is also proposed an exploration of the underground river with initiation to speleology.”

“For 30 years, impassioned people of archaeology and mining speleology have explored 70 kilometers of galleries.”

“The first man known to have descended Gaping Gill is well known on the Continent as an expert cave-explorer or speleologist — to use the new term which he perhaps invented.”

“The Velebit region is Croatia's largest mountain range, attracting speleologists, botanists and hikers from around the world.”

“That record put the Bulgarian speleologists among the first to reach the lowest point of the planet Earth.”

“When speleologists found one such cave in 1977, they named it after Australia's Prime Minister, Malcolm Fraser.”