Portugal, Lisbon, Belem Tower, 16th-century fortification that served as a point of embarkation and disembarkation for Portuguese explorers and as a ceremonial gateway to Lisbon, the tower symbolizes...

Portugal, Lisbon, Belem Tower, 16th-century fortification that served as a point of embarkation and disembarkation for Portuguese explorers and as a ceremonial gateway to Lisbon, the tower symbolizes...

Portugal, Lisbon, Belem Tower, 16th-century fortification that served as a point of embarkation and disembarkation for Portuguese explorers and as a ceremonial gateway to Lisbon, the tower symbolizes...

Portugal, Lisbon, Belem Tower, 16th-century fortification that served as a point of embarkation and disembarkation for Portuguese explorers and as a ceremonial gateway to Lisbon, the tower symbolizes...

Germany, Hesse, Idstein, Hexenturm or The Witches Tower is one of the oldest surviving buildings in Idstein as well as the tallest.

Germany, Hesse, Idstein, Idstein Castle is a Renaissance style schloss which was the residence of the counts of Nassau-Idstein and was built in 1714.

Germany, Hesse, Idstein, Idstein Castle is a Renaissance style schloss which was the residence of the counts of Nassau-Idstein and was built in 1714.

Germany, Hesse, Idstein, Idstein Castle is a Renaissance style schloss which was the residence of the counts of Nassau-Idstein and was built in 1714.

Germany, Hesse, Idstein, Idstein Castle is a Renaissance style schloss which was the residence of the counts of Nassau-Idstein and was built in 1714.

Germany, Hesse, Idstein, Idstein Castle is a Renaissance style schloss which was the residence of the counts of Nassau-Idstein and was built in 1714.

Germany, Hesse, Idstein, Stone gateway leading to the town's castle or Residenzschloss.

Spain, Castile and Leon, Avila, Avila Cathedral tower viewed from the walkway along the interior perimeter of the city walls that were built from 1090 onwards and are among the best-preserved and most...