Not Good for the Tourist Trade

  καὶ ἀνδρός ἐστιν ἰδίᾳ μνῆμα Μιλτιάδου τοῦ Κίμωνος, συμβάσης ὕστερόν οἱ τῆς τελευτῆς Πάρου τε ἁμαρτόντι καὶ δι᾽ αὐτὸ ἐς κρίσιν Ἀθηναίοις καταστάντι. ἐνταῦθα ἀνὰ πᾶσαν νύκτα καὶ ἵππων χρεμετιζόντων καὶ ἀνδρῶν μαχομένων ἔστιν αἰσθέσθαι: καταστῆναι δὲ ἐς ἐναργῆ θέαν ἐπίτηδες μὲν οὐκ ἔστιν ὅτῳ συνήνεγκεν, ἀνηκόῳ δὲ ὄντι καὶ ἄλλως συμβὰν οὐκ ἔστιν ἐκ τῶν δαιμόνων ὀργή.

 So Pausanias,Guide to Greece, 1.32.3,  link.   W.H. Jones translates:

Here is also a separate monument to one man, Miltiades, the son of Cimon, although his end came later, after he had failed to take Paros and for this reason had been brought to trial by the Athenians. At Marathon every night you can hear horses neighing and men fighting. No one who has expressly set himself to behold this vision has ever got any good from it, but the spirits are not wroth with such as in ignorance chance to be spectators.

Link.  No, wait, maybe that is exactly what the tourist trade wants.