In the Summer 2012, Tbilisi City Hall closed a 4-lane Pushkin street near the Liberty square for fundamental renovations (that is starting from sewer and drenage, finished with facade polish of the buildings) during which some interesting archaeological findings were unearthed.
Namely, excavators accidentally dug out remnants of the old Tbilisi wall and two of several gate towers that guarded the town. Archaologists claim that the findings date back to 12th century, with some stone carvings in Arabic language, artillery balls and other signs of developed urban life found on the site.
Due to the unexpected circumstances, City Hall decided to close two lanes of the street and make it one-way (causing some trffic problems on the riverside), thus preserving historical site and adding one more tourist destination to downtown, which is now frequented by locals as well.
The street goes along Georgian Museum of Arts
Lots of people were coming even during the night to watch whole neighborhood of people like them in the past being unearthed slowly, step by step. If you stayed long enough, you had a chance to eavesdrop many interesting, silly or just fabricated stories about the place and its existence.