William the Conqueror established the castle in 1066 as part of the Norman Conquest. The White Tower was built in 1078, making it England's earliest stone keep. The castle was initially used as a prison from 1100 to 1952
Winter Palace served as Russian Emperor's residence from 1732 to 1917. St. Basil's Cathedral was Moscow's tallest until Ivan the Great Bell Tower. Peter and Paul Fortress was originally St. Petersburg's citadel. Peterohf Palace was designed by Trezzini as Versailles-like palace
Sagrada Família combines Art Nouveau and Gothic influences by Gaudí. Geghard Monastery in Armenia was built into mountainside in 4th century. Acropolis of Athens features over twenty structures including Parthenon. Pyramids of Giza contain three main pyramids and Sphinx statue
Comboios De Portugal offers AP and IC services between Lisbon and Porto. Journey takes 2h 45m to cover 313 km distance. Up to 12 direct connections available daily. First train departs at 10:39 AM, last at 10:45 PM. Cheapest ticket is €14, average price around €25
Built on Athens' acropolis between 421-406 BCE to house Athena's wooden statue. Named after mythical Athenian king Erechtheus. Constructed from Pentelic marble with honey-colored iron traces
Colosseum in Rome (70-80 AD) was one of the Seven Wonders. Taj Mahal in India (1593-1631) is one of the Seven Wonders. St. Basil's Cathedral in Moscow (1555-1561) features nine domes shaped like flames. Hagia Sophia in Istanbul (360-537 AD) was converted to mosque multiple times. Parthenon in Athens (447-432 BC) is one of the oldest surviving Greek temples