Here is John Fahey's version of "Siege Of Sevastopol" played in open D (Vastopol) tuning. John Fahey's Siege Of Sevastopol
Here's Norman Blake's version of "Spanish Fandango" played in open G (Spanish) tuning. Norman Blake's Spanish Fandango
Here's Libba Cotten's version of "Spanish Flang Dang" played in open G (Spanish) tuning. Elizabeth Cotten's Spanish Flang Dang
Here's Libba's version of Vestopol.
Elizabeth Cotten's Vestopol