Tripnaksha.com is no longer available.
If you are looking to mark routes, trails online, please check everytrail.com. They do a very good job.
The source code for the earlier website is at https://github.com/tripnaksha/sourcecode.
Make sure you check all files for malware and update before using the code.
GoUNESCO is a fun challenge where you travel to UNESCO world heritage sites around the world.
It is most likely that you have already been to a few of them, check here - explore.