it is here where there are undoubtedly lots of discoveries to be made.

【翻译】就是在这个地方，无疑有许许多多的奥秘去发现。

【分析】这是一个强调句式，地点副词here被强调。

如果被强调的成分是地点副词，除了用that外，还可以用where。如果被强调的成分是时间副词，除了用that外，还可以用when。如果被强调的地点或时间是“介词短语”或其他情况，则不能用when 或where，只用that。例如：　　

It was yesterday that (when) he bought an English book in town.

It is here that (where) he must wait for her.

It was in this room that we had a heated discussion.

It is at ten o’clock that the meeting will take place.