Want to get away from it all for a while? Go visit Hollow Earth Underdark a fabulous build that gives you the opportunity to take a boat trip underground.
Turn your day settings to midnight and then just wander through the channels and tunnels in your boat (which works really well, the controls are smooth and easy). You can find little hideaways where you can stop and spend some time - your boat will vanish but you can just rez another when you want to continue your journey. Although I explored the site by myself you can have two in the boat - and there is a tiny version for those of shorter stature. :)
Playing with your windlight settings will create some really neat effects and make the journey that much more personal.
Terrific build, no lag and a very enjoyable experience.