Halkida is half in Euboea and the rest in Central Greece as it is built on the Port of Euripos and of course constitutes the entrance and exit of Euboea by ships. It is a city with two bridges and a unique phenomenon with the change of water every 6 hours that characterizes it. Tavernas on the beach with fresh seafood are the habits of the residents on Sundays. Necessary is the ascent to the castle and the reward you will get from the view you will see.