This dormant volcanic crater has been converted from a roiling pit of magma to a pleasant hiking spot.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

Rebuilt remains of a temple to Roman god Mithras.

Catacombs turned marketplace.

A lover's walk between hilltop towns, decorated with graffiti love notes.

Five candy-colored villages on the Italian Riviera.

Fountain where visitors can earn a license to be mad.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

A lonesome Moai stands in a small Italian town some 9,000 miles away from its Easter Island brethren.

The odd depiction of the Virgin Mary and baby Jesus is rooted in the Catholic Church's eradication of Catharism.

The world's largest wooden structure.

Single runway interrupted by a busy road that cuts across its middle.

This quaint Spanish village agreed to be painted blue as a marketing stunt but found that they preferred it that way.

A Spanish town built into the cliffs.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

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

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

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

This hidden courtyard in the Andorran capital hosts a unique contemporary sculpture park.

In one of the smallest countries in the world stands an original Salvador Dalí sculpture.

A statue of a boy looks up at where the famous rival to the Leaning Tower of Pisa once stood.

This tiny river island switches sovereignty every six months as part of a rare, centuries-old agreement.