Heavy pillars, carved from the rock, bear the roof. Slowly, one's eyes become accustomed to the dim light; then they can make out marvelous representations from Indian mythology carved on the walls. ↗
An easy approach to the walls must be provided against: indeed they should be surrounded by uneven ground, and the roads leading to the gates should be winding and turn to the left from the gates. ↗
We have an unknown distance yet to run, an unknown river to explore. What falls there are, we know not; what rocks beset the channel, we know not; what walls ride over the river, we know not. Ah, well! we may conjecture many things. ↗
That's the power behind a tool like Facebook Connect. It is making a Web without walls. Facebook allows you to go to other sites to comment, rate, etc., without having to set up a new profile for that site. ↗