After the shaft a tight passage leads to some cave formations and a dead end.

Helictites are, perhaps, the most delicate of cave formations.

The remaining two areas focus on the science of cave formation.

It is a natural cave formation where rivers flows inside the cave.

However, the guests would often damage the cave formations by taking souvenirs.

Some of the most beautiful cave formations in Bulgaria can be seen inside.

The particularly effective zone of cave formation is the epiphreatic zone.

As this is a cave formation, there is no provision to go around for the pradakshina.

At the end of the tunnel, visitors pass through a smaller third door that leads to trails for viewing cave formations.

During the brief (20-minute) stop, most people climb to the top of the island, but there are also cave formations at the island's northern end.