Address: 1814 Senter Ave., Burlington, ColoradoPrice: $298,000Size: 4,175 square feetBedrooms: 3Bathrooms: 3In my experience, some of the most astonishing ‘60s and ‘70s interiors are hidden inside seemingly average-looking houses. That’s certainly the case for this groovy spot in Burlington, Colorado, which is on the market for just $71 per square foot.The three-bedroom brick home appears unassuming from the street.