"Trinity College Library, Dublin - the smell of old books is amazing : )" Is there anything as beautiful as a library? And just think, at this point if you started reading that library, you would not live to finish it. At least, not at my speed.
Barcelona - Ceiling of the Sagrada Familia, Spain. The columns of the interior are a unique Gaudí design. Besides branching to support their load, their ever-changing surfaces are the result of the intersection of various geometric forms.