Vilnius Historic Centre

Political centre of the Grand Duchy of Lithuania from the 13th to the end of the 18th century, Vilnius has had a profound influence on the cultural and architectural development of much of eastern Europe. Despite invasions and partial destruction, it has preserved an impressive complex of Gothic, Renaissance, Baroque and classical buildings as well as its medieval layout and natural setting.

http://whc.unesco.org/en/list/541

The Lithuanian capital Vilnius is a historic trading town with medieval origins. It is situated right on the boundary between Catholicism and Russian Orthodoxy. It also holds a variety of other religions, like that of the Karaites, Jews and Muslims.

The historic buildings are built in the Gothic, Renaissance, Baroque and Classical styles.

http://www.worldheritagesite.org/sites/vilnius.html

Curonian Spit

Human habitation of this elongated sand dune peninsula, 98 km long and 0.4-4 km wide, dates back to prehistoric times. Throughout this period it has been threatened by the natural forces of wind and waves. Its survival to the present day has been made possible only as a result of ceaseless human efforts to combat the erosion of the Spit, dramatically illustrated by continuing stabilisation and reforestation projects.

http://whc.unesco.org/en/list/994

The Curonian Spit is a 98 km long, thin, curved sand dune peninsula that separates the Curonian Lagoon from the Baltic Sea. It has been made a WHS because of the human efforts since prehistoric times which have prevented the erosion of the Spit. 

The peninsula contains a number of 19th century fishing settlements along the coast of the Curonian lagoon. At the end of the century they were joined by more elaborate buildings such as lighthouses, churches and villas. The Spit at that time became a recreational centre. 

http://www.worldheritagesite.org/sites/curonianspit.html