How far from the river is the entrance to that cave known as Base One?

The often dormer-shaped entrance is known in Alemannic as a "Ifahrhüsli".

The entrance to the cave had long been known.

A sole entrance exists and is known only to the Baluurians themselves.

This entrance is known only to the Leaders, the Commanders of all Bands.

The natural entrance is approximately 8 meters wide and was well known to local residents from the earliest times.

The cave was discovered in 1870 by Eugen Ruffinyi, though the entrance was known long before.

The unofficial entrance to the University has always been known only to students.

The entrance to the cave was always known.