In and out to Ialomicioara Cave...

The Ialomicioara Cave has had a long history, being certified for the first time in 1510 when the Wallachian prince  Mihnea Vodă cel Rău  would had hidden here. But the cave was first described in 1793.  Cezar Bolliac , Romanian writer of the 19th century, discovered in 1870 almost all the major galleries till the Bears' Hall. 

Ialomicioara Cave It is located on the right side of Ialomitei Gorges, in Moroeni locality, Dambovita county, at 1,530 altitude.
Ialomita name comes from Dacian word “jalomit” which means “to cry”. The cave is actually known as an ancient place of Dacians where they used to celebrate the personality’s death in order to become an individual immortal being.
Right at the cave’s entrance lies Ialomita Monastery built in the 16^th century by ruler Mihnea cel Rau (Mihnea the Bad). The monastery has burnt several times during the history.

The largest cavity of the cave is represented by the Bear Hall. When the first people discovered it, they found bones and even full skeletons of Ursus Spelacus Blum, or the cave bear, with many of them being tracked down above-ground, which leads to the assumption that the cave was among the last hideaways of the cave bears 10,000 years ago.

http://www.romaniajournal.ro/what-secrets-is-ialomicioara-cave-hiding/