from ICHC, of course
My ma alerted me to a new website that she came across the other day. It's called Historvius, and you can use it to find historic sites to visit around the world. You can search by country, time period, or even historical figure related to a site. Visitors can also upload sites not yet listed; there are currently no Slovak and only three Czech places listed, but you can rest assured that I've already uploaded one as a test and will upload more once the first's been accepted. Right now Historvius is in beta, so things may change on the site as time goes by, but I encourage you to check it out.
