Anyone who has been in even the most commodious underground gallery knows what happened.

Elsewhere, amber is mined, both in open works and underground galleries.

Several underground galleries to reach the far outside, one of them being a mile long, were dug and equipped.

He had no idea how long it would take to travel through the underground galleries.

The section devoted to the German secret weapons program is set in an underground gallery.

The blocks are connected by a single large underground gallery.

Block 2 was attacked first, driving the defenders into the underground galleries.

Large underground galleries were found here which served as a necropolis during the 4th and 5th centuries.

On the other hand, these underground galleries aren't exactly blighting the landscape; you have to go looking for them.

There is also an underground gallery with further burials for royal women.