This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

This funky former tobacco factory is one of the most striking examples of Madrid's cultural diversity.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

These distorting, funhouse mirrors achieved fame in a renowned piece of Spanish theater.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

The bears of Bern have been a city highlight for over 500 years.

A dreamy mausoleum honors Persia's most famous poet.

This 17th-century structure is a beautiful testimony to traditional Persian architecture

The ancient necropolis houses the immense rock-cut tombs of four Persian kings.

A spectacular rainbow of stained glass makes the "Pink Mosque" one of the most beautiful in Iran.

The final resting place of the great navigator, or maybe his brother.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Legend says this sacred tree was a gift from goddess Athena.

An ancient octagonal weather station named for the eight Greek gods of wind.

Legend says it was constructed with the destroyed pillar of an ancient Greek Temple.

View the ancient remains of buildings and the ancient "River of Hades" before hopping on a train.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

Bold black and white motifs of life and death add a dramatic flair to this 17th-century crypt.

Kissing the ass of this stone lioness has become a rite of passage in the city of Girona.

Touching the iron railings of Tarragona's balcony to the Mediterranean is said to bring good luck.

Morocco's largest Jewish cemetery.

A beautiful little museum hidden away in the heart of Barcelona holds a treasure trove of Ancient Egyptian artifacts

One of Antoni Gaudí’s earliest buildings, built between 1886 and 1890 for the industrialist Eusebi Güell.