1 Elcho Castle, the Rhynd, near Perth, PH2 8QQ. (4 miles from Perth, just off A912.), â +44 1738 639998, [20]. 1st April - 30th September. 2  M-Su, 9.30AM to 5.30PM, closed during the winter season. 3  Built on the site of an older structure in around 1560, it is one of the best examples of it's kind still remaining.