This document lists and briefly describes 10 unique churches from around the world. Some key details include:
1) The Harajuku church in Tokyo has a ceiling designed to reverberate sound for 2 seconds to provide a unique listening experience.
2) St. Basil's Cathedral in Moscow has iconic colorful onion domes and was commissioned by Ivan the Terrible.
3) Hallgrmskirkja in Reykjavik, Iceland is the fourth tallest structure in Iceland and took 38 years to build.
4) The underground Temppeliaukio Rock Church in Helsinki has a copper wire ceiling and was blasted out of solid rock.