“When you’re lying in bed at night, you can’t tell where the wall ends and the ceiling starts,” Mark says. “The corners disappear.”  Photo 5 of 13 in A Tiny Footprint Isn’t So Bad When You Live in a Tower

A Tiny Footprint Isn’t So Bad When You Live in a Tower

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"When you’re lying in bed at night, you can’t tell where the wall ends and the ceiling starts," Mark says. "The corners disappear."