Clarke wakes up in the City of Light after taking the chip in episode #316 "Perverse Instantiation, Part 2".
Source: Chris Fisher — Instagram
Sam Flynn rides his bike up a ramp in the middle of downtown after escaping the cop.
Parking garage ramp seen in episode #109 "Tigh Me Up, Tigh Me Down" and in the opening credits.
Source: BSG Season 1 Location Guide