Terra Firma Bouldering, Grand Rapids

For the folks at Terra Firma, the higher they get, the more fun they have. In fact, that's the entire thrill behind bouldering—a sport similar to rock climbing, but without any harnesses or ropes.

In lieu of those traditional safety measures, Terra Firma Bouldering boasts thoroughly padded flooring to cushion potential falls. It also shares safety techniques with first-timers, and it offers an Intro to Bouldering course, which members and holders of day passes can take for free.

The 10,000-square-foot facility also includes a coffee and snack bar to keep guests energized, not to mention its most intriguing amenity for members: a co-op-style work space, which features free WiFi, tables, sofas, and easy access to the climbing facility for breaks.