In Sofia Alexander Nebski church, National palace of culture; in Plovdiv: the Armenian church, Ruski pazar, the Mosque, In Ruse-Madarski konnik
No, you don't need. You can arrive in Bulgaria just as a visitor (tourist).
The Rila Monastery
Black Sea resorts
Global ranking of Tourism: Bulgaria is in 48th place (after a survey of 139 tourist destnation countries)
You can find pictures of houses in Bulgaria at Estate Agency sites that operate in Bulgaria such as New Estate BG and All Bulgarian Property. You can also find these pictures at sites such as Village Homes Bulgaria and The Move Channel.
Swilly
A local tourist is someone visiting interesting sites in his own area.
animal safari
The internet site called Bulgaria Travel Organization provides information about Bulgaria and it's tourist destinations. It has a good profile and seeks to help those planning to visit there.
Berlin. A lot of tourist travel for their beer and nightlife
Amsterdam, Rotterdam
Statue of Liberty