http://xmr.nowherejezfoltodf4jiyl6r56jnzintap5vyjlia7fkirfsnfizflqd.onion/opsec/tor/relay/index.html
Now regarding the choice of location for the server, in order to make sure that Tor remains decentralised, make sure that you are picking a country that doesn't have many tor nodes (see the bubbles graph ): Disclaimer: Do not host your Tor node in Germany, Netherlands or in the US, as there are already too many nodes in those countries. Try to run your own Tor nodes in countries that have the least nodes preferably, as this will help keeping the Tor network decentralized.