A natural wonder in south Denmark.

This colorful artistic feature atop a Danish art gallery allows visitors to stroll through a rainbow.

Vortex-shaped aquarium hosts Europe's largest school of piranhas and other ocean creatures.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Hans Christian Andersen for the postmodern world.

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

This sublime architectural marvel is a rare example of an expressionist church.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

Copenhagen's celebrated theme park and gardens.

The cathedral stands in New Jufa, Isfahan's Armenian quarter that was established in 1606.

17th century mosque for Shah Abbas' harem.

These little castles each held thousands of pigeons.

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

The fire inside this temple has burned for more than 1,500 years.

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

Mirrors and glass shards cover every inch of this arrestingly beautiful mosque.

Named after a legendary garden called Eram in southern Arabia, built by order of Shaddad, an Arab king who wanted to compete with Paradise.

A dreamy mausoleum honors Persia's most famous poet.

Long before air conditioning, Persian architects found an ingenious way to cool off.

Putrefaction plateaus in Iran, where the dead were sent for decontamination before going to their final resting place.

This ancient burial site is believed to be one of the first earthquake-protected structures in the world.

This massive monument was unveiled the day Kosovo declared independence from Serbia.