Wednesday Wanderings: Canadian Superman Currency, Ikea Perfect Setting for Zombie Movie, Superheroes Save Cat, and World’s Largest Cave

This week on the internet:

In honor of Superman’s 75th birthday, Canada is introducing six commemorative coins with a Superman theme. Collector’s items, for sure, but also real currency. With collector pricing on some:

Is Ikea the perfect setting for a zombie movie? According to this article from the Huffington Post, yes. And here are the six reasons why:

Think those superheroes aren’t real? Ask this cat, rescued from a burning house by Batman and Captain America:

The world’s largest cave, in Vietnam, is opening for six day public tours. The cave has a jungle, a river, and could fit a 40-story skyscraper: