What's really interesting to me are the lesser-known secrets of the subterranean kingdom.

A subterranean kingdom of Dwarves generally isolated from the bulk of the continent.

They often live in subterranean kingdoms, and have a great love of craftworks, especially things made of gold, silver, and mithril.

She said an entrance to the subterranean kingdom will be discovered in the 21st century.

Ossendowski said he was told about a subterranean kingdom exists inside the earth.

What did the outer world hold half so fine as the wonders of that subterranean kingdom?

In the book, Ossendowski tells of a story which was imparted to him concerning a subterranean kingdom which exists inside the earth.

Remember the time you and I reincarnated in that subterranean kingdom?

He resides in the subterranean kingdom of Skellweb, where he commands a massive undead army.

Mello's 8,000-square-foot cave is proving a fine site to stand in as the Phantom's subterranean kingdom.