This home’s walls have ears. And eyes. And behind all the portraits lining them, a lot of nail holes for new owners to fill. Located at the corner of 9th St. and Tulane in the Houston Heights, this little casa is part of a small enclave of Spanish Colonial homes that rose on the block a decade ago. Inside you’ll find 3 bedrooms, 2 1/2 baths, and enough wall space to field a collection of collections.