Holiup

Puerto Ricohigh altitudeFalkland IslandsAntarcticakids' activitiestemperateMyanmaraurora borealisAndorraEuropeCanandaiguaremoteComorosbeachislandsEastern Sayan Mountains

caves at Uetikon, Switzerland

Baptist Cave

23km

Täuferhöhle7

Täuferhöhle6

Täuferhöhle5

Hell grottos

25km

Höllgrotten Baar lower cave 20201015

Höllgrotten 09

Höllgrotten 05

Round Lime Formations Hell-Grottoes

Water boundary

Undewater formations Baar