Atomium

There's nothing quite like this cluster of giant spheres representing the atomic structure of an iron crystal enlarged 165 billion times, rising 102m (335 ft.) like a giant plaything of the gods that's fallen to earth. The model was constructed for the 1958 World's Fair. Whatever you think of its founding impulse, it's a fair bet that when you stand underneath this vast schematic you'll be suitably impressed. There may be something last-century about this paean of praise to the wonders of science and technology, but the Atomium has somehow moved beyond this, taking on a monumental life of its own. The view from the deck on the top sphere is marvelous, and you can even wander around inside the spheres.