In the infirmary, second floor of this old building at Fossanova Abbey. There’s a little chapel there now.
Fossanova is about an hour’s drive from Thomas’ birthplace in Roccasecca. Not exactly close, since he didn’t ride a horse and traveled exclusively on foot.
But considering that the man had walked some 9,000 miles in his life, had lived in Paris, and was in fact on his way to Lyons, France (on foot) when he fell deathly ill, the moment came remarkably close to Aquino, and the mountains he gazed upon in his youth.
When I visited Ars years ago, a saint who had previously intimidated me by his austerity of life (John Vianney) became human to me, when I saw the very confessional where he sat for hours on end, and the ramshackle little kitchen where he boiled his potatoes.
Now, a saint whose mind has intimidated me suddenly became more human, because I have seen the mountains where he grew up, and where he died.
The ridges of Lazio could move you to contemplate the Five Ways, to be sure. That’s just the beginning of what they can make you contemplate.
Father Mark White Blog 
Father, are you saying St. Thomas was a peripatetic?
Padre San Marco, have you read The Dumb Ox? (Rhetorical question.)
No one can compare and contrast more poetically than Chesterton.