For the last century, this international border within a small town has appeared and disappeared various times.

This ancient theater was once the home of fierce gladiatorial battles.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

This statue once earned the distinction as one of the "Three Major Disappointments of the World."

Constructed by forced laborers, this submarine pen is now a museum and war memorial.

The oldest continuously operating pharmacy in Europe.

A series of concentric circles represented a bold new experiment in socialist urban planning, and it notoriously difficult to get around.

This former medieval prison now unlocks Estonia’s rich photographic history.

One of the most well-preserved castles in Italy also contains a rare medieval example of a port fortification.

Bored potato-guarding Nazis etched their thoughts onto a brick storage building in Copenhagen's Meatpacking District.

The art museum is decorated with creatively remodeled pre-Nazi swastikas.

A collection of noses tucked inside an art museum reveals how times have changed.

The largest bottled beer collection in the world holds over 22,000 unique beer bottles.

This museum’s collection includes rescued birds, fine art, and a collection of shrunken heads.

Ecuador's first Catholic church was built by Spanish conquistadors in 1534.

An Ecuadorian haberdashery that sets the record straight about the so-called "Panama" hat.

Ecuador's largest Incan ruins show evidence of sophisticated irrigation and diplomacy among the ancient builders.

Massive volcano in the Andes is the farthest point from earth's center.

A swing to dangle you off the very edge.

A turquoise lake within a volcanic crater.

This modernist cinema has survived war and reconstruction to become a symbol of Lebanon’s revolutionary spirit.

This overlooked, beautiful convent hides an original Hieronymus Bosch among its many treasures.

This 12-inch-tall wooden sculpture of a winged Virgin Mary has inspired much devotion and countless replicas.

Legend says if this neo-Gothic basilica is ever officially completed, the world will come to an end.