Lakki is the main harbor and one of the most important towns on Leros, built in a deep, naturally sheltered bay. It serves as the island's administrative and commercial center, with active port operations and daily life.

Lakki is notable for its unique architecture, featuring strong Italian Rationalist influences from the period of Italian occupation, making it quite different from typical Greek island settlements. The area includes shops, cafés, services, and a marina, while the waterfront is ideal for walking.

Overall, Lakki is the main hub of Leros, combining history, functionality, and a distinctive architectural identity.