During my South India tour, the only destination I was not really inspired was Rameshwaram. Inspite its huge religious and historic importance (and also that it was an Island), the destination itself did not appeal to me, mainly because of the uncleanliness and upkeep. But, what did appeal to me was Pamban Bridge, a cantilever rail bridge connecting Rameshwaram to mainland India.
Pamban Bridge is not only India's 1st rail bridge, but also country's second largest. It was opened for operation in 1914 and still-functioning double-leaf bascule bridge section that can be raised to let ships pass under the bridge.
One the way from Madurai to Rameshwaram, this bridge is the first structure which travelers come across. It is also an indicator that one has arrived in Rameshwaram. The Pamban bridge is a popular attraction and travelers stop enroute and take pics of the bridge (we did too).
If you plan to visit Rameshwaram, do take your photo opportunity at Pamban Bridge.