Ten metres under Plaza de Isabel II, inside Ópera metro station, the remains of the 16th-century Caños del Peral fountain, the Amaniel aqueduct that carried water to the royal palace and the Arenal sewer, found during the station works.
- Address
- Metro Ópera station (lines 2 and 5), Plaza de Isabel II, 28013 Madrid
- Hours
- Fri 16:00-20:00; Sat 10:00-14:00, 16:00-20:00; Sun 10:00-14:00
- Best time to go
- Afternoon · About 30 min
- Price
- Free; you need a metro ticket to enter the station (esmadrid.com 2026)
- Price level
- €
Details can change. Check hours and prices before you go.
Good to know
- It is on the second level of the station, next to the Line 2 platform towards Las Rosas.
- Free visit up to 40 minutes; guided visits need booking.