If i am visiting a https Website will my ISP see the IP i am connecting to, or is the destination IP adress somehow hidden because i am using ssl?
tl;dr: Yes. You need to use a proxy or VPN to hide the destination of your traffic forom your ISP.
The Long Version:
As described in this section of the IPv4 Wikipedia article, IP packets have a header section and a data section. The header section contains, among other things, the
Source IP Address and
Destination IP Address fields. These fields are essential to facilitating the communication between the source and destination, so encrypting them would make it impossible for the source and destination machines to communicate. SSL only encrypts the contents of the data section, though not the entire contents -- there are a few more layers of protocol headers before you get to SSL (see the OSI model for more on that).
That said, the source and destination IP addresses in an IP packet may not be the final destinations on either side of the underlying communication. The data section of the IP packet can contain another IP packet (or a different protocol) to be unwrapped, interpreted, and transmitted by the recipient in accordance with a VPN or other proxy solution.
To hide the IP of a site you are visiting, regardless of the presence of HTTPS, you would need to use a VPN, proxy, or other anonymity service (such as tor) to make the connection.