On a recent 'doors open day' here in Edinburgh (where buildings that the public often never see are opened for viewing, I took the opportunity to visit a wee gem of a structure that I had walked past many times, but never investigated: the monument to Robert Burns at Waterloo Place (just below Calton hill).
It's a beautiful Greek revival style building based on the Choragic Monument of Lysicrates in Athens and designed by Thomas Hamilton - the architect responsible for the (now sadly empty) Royal High School (itself just opposite the monument).
Originally it was built to house a statue of the poet, but the statue has long since departed and can now be found in the Scottish National Portrait Gallery. Still, the building has a presence of its own and is well worth a look should the opportunity ever arise.
You can read more about the monument at the Edinburgh Museums Website.