Humayan's Tomb

The sky needs a little punching up for contrast -- as do some of the other colors.

If you aren't wedded to authenticity, you could even think of dropping in a different sky color, but I know this thought is anathema to many :->.

Alternatively, have you tried a b&w or duotone effet? It would let the contours of the building show without being distracted by the lack of punchy colors.