The user is asking about a specific levada walk - "Rota Grande da Levada do Furado Velho". Let me search for this trail in ourhikes database.The search returned no results. Let me try a broader search - maybe the trail name is slightly different. Let me try just "Furado" or "Rota Grande".The user is asking about "Rota Grande da Levada do Furado Velho" - this is a specific levada walk in Madeira. Let me analyze what I found: 1. The official PR trail database has PR 10 "Levada do Furado" (Ribeiro Frio → Portela, 11 km, Moderate, 5 hours). This is the official IFCN trail. 2. There are several community trails related to "Furado" in the AllTrails catalogue: - "Levada da Portela - Levada do Furado - Fissure" (7.9 km, moderate, 4.3★, 28 reviews) - "Levada Serra do Faial - Levada do Furado - Pico do Suna" (18.5 km, hard, 4.0★, 31 reviews) 3. "Rota Grande da Levada do Furado Velho" - this specific name didn't match anything. The "Furado Velho" part is interesting - there's a "Levada do Furado" (PR 10) which is the current/main levada, and "Furado Velho" would mean "old Furado" - suggesting the old/original route of the Levada do Furado. Let me look at the community trails again. The "Levada da Portela - Levada do Furado - Fissure" route mentions "the historic canals of the Levada do Furado and the Levada da Portela" and goes through laurel forest, tunnels, and narrow footbridges. This could potentially be what's known as the "Rota Grande da Levada do Furado Velho." However, I don't have an exact match for "Rota Grande da Levada do Furado Velho" in my data. The official trail is PR 10 Levada do Furado, and there are community routes that incorporate the Levada do Furado. I should be honest about what I found and what I didn't. The name "Rota Grande da Levada do Furado Velho" doesn't exactly match any trail in my database. The closest official trail is PR 10 Levada do Furado, which goes from Ribeiro Frio to Portela. "Furado Velho" literally means "Old Furado" or "Old Tunnel" - this is likely an alternate/older name or variant route. The "Rota Grande" part means "Great Route" suggesting it might be a longer version or combination. Let me present what I have - the official PR 10 Levada do Furado and the related community trails - and explain that the specific name "Rota Grande da Levada do Furado Velho" doesn't match exactly, but these are the closest trails. Actually, looking more carefully at the community trail "Levada da Portela - Levada do Furado - Fissure" - its description mentions "the historic canals of the Levada do Furado" and goes through tunnels. This could be what's sometimes called the "Furado Velho" route (the older/original path of the Levada do Furado, as opposed to the PR 10 route). Let me present the information clearly.