
The architecture of natural caves
Rivers and life in total darkness
Hidden cities carved in stone
The modern world under the streets
YOUR GOAL
Master of Worlds beneath our feet
misslily Underground River Ecosystems
Deep in the shadows of the underground streams, we find a blind dragon that doesn't need dreams.

misslily This blind, aquatic salamander can survive without food for a decade and lives up to one hundred years.

misslily Animals living in perpetual darkness lose their eyes and pigmentation, relying instead on heightened touch and pressure senses.

misslily Time your boat's journey to learn how ocean tides flow through this underground river.
Olm longevity: The blind olm salamander is so stationary that scientists once tracked an individual that did not move for seven years.
An aquatic animal that lives in subterranean water systems and is adapted to complete darkness. The blind olm is a subterranean salamander inhabiting the pitch-black waters of Slovenia's Postojna Cave.
Which of the following describes the water in the lower section of the Puerto Princesa Subterranean River?
In what year was Romania's completely isolated Movile Cave first discovered by humans?
For up to how many years can the blind olm salamander survive without eating any food?
What chemical compound powers the ecosystem of Romania's isolated Movile Cave instead of sunlight?
Where is the Puerto Princesa Subterranean River, which flows directly into the sea, located?
What is the geological term for a surface river that vanishes underground into a sinkhole?