With many apartments around the world already approaching the size of small train stations, a development in Puntarenas, Costa Rica, raises the bar several notches with a unit billed as the “world’s largest penthouse.” Genesis Puntarenas will be topped with an apartment weighing in at 68,459-square feet, complete with helipad, tennis court and swimming pool, says Caspi International, the project’s Chicago-based developer. The price tag on the 10-bedroom, 14-bath apartment: $50 million.

