We see landmark designation as another step in preserving this unique architectural treasure.

In addition to the unique treasures, each stage has a piece of the map that is hidden in a treasure chest.

Each area has its own unique treasure that is guarded by a boss.

Deep in the heart of the state's mountains is a unique natural botanical treasure.

Described as the eighth wonder of the world by those who saw it, the Amber Room is certainly the most unique missing treasure in history.

But Shakespeare's account of the incident is a unique treasure of mankind.

We regard you as a unique spiritual treasure.

It is a unique architectural treasure of 19th century urban America.

Linguistic diversity is part of Europe's cultural legacy and a unique treasure that we all have a responsibility to protect.

Hidden gem, unique treasure, and charming all come to mind.