Ruinas del Castillo San Carlos

Zoologico de

The Salto Grande Dam is a large hydroelectric dam on the Uruguay

The San José Palace (in Spanish, Palacio San José) is the former p

The Libertador General San Martín Bridge is a cantilever road bridge

Tsarevets (Bulgarian: Царевец) is a medieval stronghold located on a h

Tustan  was a Medieval cliff-side fortress-city and customs site of

The Rock of Cashel (Gaeilge. Carraig Phadraig), also known as Cashel

Rumkale was a powerful fortress on the river Euphrates, 50 km

Hammershus is Northern Europe's largest medieval fortification,