Santa Maria della Concezione is a church with crypt below. the crypt contains the skeletons of hundreds of monks arranged on the ceiling and walls to make decorative displays; sunbursts, archways, flowers etc. very, very creepy but strangely beautiful and well worth a visit for its sheer uniqueness.
on the via vento road, from the outside the church isn't much to look at - look out for the name to be sure you're in the right place. a minimum of 1euro 'voluntary' donation is expected. ladies be wardned - a strict dress code is enforced - no shorts, no bare shoulders