There’s a 200-foot sculpture of a sea monster in one of the rooms, and it’s far from the strangest thing in the house.

To reach the House on the Rock—a roadside attraction in southwestern Wisconsin perched atop a 60-foot tall rock—you must venture up a winding driveway half a mile long, past gigantic urns and sculptures of dragons stationed like sentries along the road. Once you finally crest the top of the hill, you’ll see the house itself, which is less of a “house,” in the traditional sense of the word than a massive, multi-storied cliffside complex (with lots of blacked-out windows) surrounded by man-made waterfalls and Japanese gardens. The exterior and the grounds are a little strange, to say the least, but they’re nothing compared to what’s inside: a motley collection of real and fake antiquities–thousands upon thousands of them–arranged in vast, dimly lit rooms decorated to look like exhibitions nicked from some sort of nightmarish, post-apocalyptic museum.

Looking for a reason to visit? We’ve got 15 for you, in ascending order of weirdness.