Drive-Thru TreeCheck out Rohan and Paul's experience with the Drive-Thru Tree during a motorhome road trip in California:
This huge tree, known as the Chandelier Tree, is a 315 foot tall Coast Redwood. The hole to allow cars (but evidently not huge RVS!) to drive through was carved in the 1930s. You can find it in Leggett, California.
Make sure you check your vehicle will fit before gunning it through the tunnel- as Rohan points out, a giant redwood is definitely an overhanging object!
Look here for RV Rental USA and book your own roadtrip!