Conveniently located in Seoul's Yeouido neighborhood, the riverside Hangang Park is a green outdoor area popular with both locals and visitors. Open year-round, the park frequently hosts festivals and concerts, such as the Cherry Blossom and World Fireworks Festivals.

Venetian rule in Santorini extended from 1207 to 1580, and the last vestiges of this historical period live in the castles that dot the entire island. Five fortresses can be found in Santorini in Oia, Pyrgos, Emporio, Akrotiri, and Skaros, which have been partly demolished by the earthquakes that shook the island in the 15th and 16th centuries. Skaros is probably the most important and well-preserved among the five castles, built on the peak of the namesake rock to protect the village from pirate attacks. The ruins of the once magnificent fortress can be reached on foot from Agios Georgios church in Imerovigli, connected to Skaros by a 0,5 km walking trail and a long stairway.

Eiserner Steg is a pedestrian bridge from 1869 linking central Frankfurt with Sachsenhausen. Pause halfway to take in the views of the river Main and the city skyline, and don’t forget the camera for a classic Frankfurt shot.

The Cheonggyecheon was originally a creek that flowed through downtown Seoul -- in the wake of rapid post-war economic development, it was buried under concrete to facilitate urban expansion. Today, however, the over 10 km-long creek and its banks have been uncovered and remodelled into an exciting recreational area for locals and tourists, with clean water and natural habitats bordering on residential and office buildings.