From highway A1 Milano - Napoli or from highway A24 Roma - L'Aquila/Pescara: follow direction Roma Sud, exit Monte Porzio Catone, then follow signs to Villa Mondragone and Hotel Villa Vecchia (follow the road signs for Frascati).
From downtown Rome:
take the G.R.A. (Grande Raccordo Anulare, the ring highway around Rome) to the highway A1 Roma - Napoli, then exit Monte Porzio Catone. Follow signs to Villa Mondragone and Hotel Villa Vecchia. (https://earth.app.goo.gl/wCizWs)
From Termini railway station
Take the underground "A" to the final stop Anagnina (ticket 1,50 €).
From ANAGNINA underground "A" final stop catch a blue COTRAL bus direction Rocca Priora (bus-shelter n.° 6) to Monteporzio Catone and get off at the Villa Vecchia Hotel bus stop.
Frascati downtown can be conveniently reached from Termini central railway station by train. Trains nearly every hour; journey takes about 40 minutes. Tickets are available at the Station and cost about 2,00 €.