I am morbidly fascinated by hoarders. Animal hoarders, paper hoarders, cheese hoarders, you name it. So when I heard about Alex Jordan, a millionaire hoarder who spent his life building a hilltop resort, I was like a moth to the flame.

Jordan began building House on the Rock in the 1940s. The outer structure, which sits atop enormous boulders, looks like a Battlestar Galactica ship designed by a Frank Lloyd Wright groupie. As soon as he began building 70 years ago, public curiosity grew. So in 1960, Jordan started letting visitors in for 50 cents a tour. Within the first year he’d made over $5,000. Today House on the Rock is among Wisconsin’s most popular tourist attractions, though prices have risen considerably: now full tours run nearly $30 per person for adults.