For the 1958 World's Fair a giant replica of an iron molecule was built in Brussels. Now, nearly 50 years later, the giant structure still stands but has been recontextualized for a new generation. The Atomium is a hotel designed for kids built in the giant structure with loads of activities and eye-catching design. Long tubes connect the nine aluminum spheres that make up the molecular structure, and inside features art and science exhibits open to the general public. The top sphere offers a beautiful panoramic view of Brussels, something that parents will probably enjoy as well. Did I mention it's built out of a gigantic iron molecule? This thing looks totally awesome, and it makes me really wish I was a kid in Belgium. Just think of it as another thing to be sure to visit on that backpacking expedition you're going to take eventually. — Adam Frucci

Atomium, via The Cool Hunter