Lost Lake, near Bend, Oregon, is really only a par...  ...it’s a meadow! Lost Lake is connected to a lava tube that drains the lake annually, but not the same t...

It has long been suspected that there are undergro...  ...nd caverns on the moon, presumably the residua of lava tubes .  Now a group of scientists led by Junichi Haruy...  ...ddle of a rille, suggesting the hole leads into a lava tube as wide as 370 metres across... Since the tubes...