Two stone columns flank the grand Venice square, but there were supposed to be three.

Go inside to really appreciate this 500-year-old technological masterpiece.

These elaborate gothic monuments honor Verona's medieval lords.

A whale rib was used to advertise the store by the arch that offered exotic goods from far away.

Not far from the more famous House of Juliet, visitors will find the supposed residence of her lover.

Pilgrimage site for star-crossed lovers.

A sculpture of the iconic East German car on four legs is a tribute to those who traveled to Prague seeking asylum.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

Also known as Uncle Karl, the beloved bronze copper keeps a watchful eye on St. Stephen’s Basilica while people rub his lucky belly.

A much-loved sculpture depicting the hero of a 1956 anti-Soviet uprising.

Op-art architecture designed for happiness.

Taking the subway here means doing so over a bridge located in the middle of an estuary.

The legendary luxury train passage is commemorated with a charming museum inside its former eastern terminus.

Ancient serpentine sacrifice holder that has stood the test of time.

A fountain standing as a testament to a doomed alliance.

The ornate miniature mansions were built for Istanbul's feathered residents.

Carvings in Turkey's Marble Road may have directed ancient Romans to a hidden brothel.

The ancient latrines of the Greeks, in all their public glory.

One of the two original gateways into the Kasbah, this gateway is a nesting site for storks.

The oldest known university in the world is in Fez, Morocco.

Traditional 11th-century outdoor tannery.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

The other side is actually green.

The facade of this relic from the Klondike gold rush is decorated with over 8,800 pieces of driftwood.