Make full relative clauses using who or which and the auxiliary BE.
Example:
The hotels shown on the map organise guided tours. → The hotels which are shown on the map...
1. New Zealand is a perfect place for those seeking adventure.
2. People looking for a good canoeing spot should try Cathedral Cove on the Coromandel peninsula.
3. The building located next to the town hall is the maritime museum.
You can delete the relative pronoun (who, which) or the auxiliary BE if the main verb in the relative clause is progressive or passive.