"Via Baltica" aka "European route E67" is an E-road starting from Prague, Czechia and finally reaching Helsinki, Finland.
Estonia's part of the road is Tallinna–Pärnu–Ikla maantee, which begins from Viru väljak, Tallinn and heads south towards Latvia.
The E67 provides a very scenery drive by itself. There are hiking routes and nature trails along the road, rest areas with fireplaces and magic pine forests atop of sand dunes. You can rest your feet at one of those places or head to the forrest and listen to sounds of winds coming from the sea.
The zero is placed near Viru Väljak. Follow the path with projection of 1km 29° to get further instructions: Sadama TB Hotell lobby
In one of the waypoints you will need the following complement information: XXX=338 Y=735
The box contains a logbook with a pencil, a small road map of Baltic states and a small collection of coins:
20 Santimu (LV), 10 Рублей (RU), 2 Złoty (PL), Quarter Dollar (US), 2 Kune (HR).
Have a good time traveling! 