According to legend, this boat-shaped henge is built over the grave of a mythic king.

This grisly exhibit houses skeletons and weapons from a devastating 14th-century clash.

Stockholm's narrowest alley is barely over two feet wide.

A golden egg-shaped sauna in the Arctic tundra.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

The library's graceful rotunda is like a bibliophile's temple.

An illuminated manuscript comprising the life's work of a lone monk, inexplicably decorated with a portrait of Satan himself.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

This French "sea of rocks" is packed with stunning rock formations and its own medieval castle.

This salt marsh in Southern France is as pink as the flamingos that inhabit it.

This plaza is home to a number of works, including Montpellier‘s own Arc de Triomphe.

This French anatomy museum greets guests with a skinless man, mid-shovel.

100-windowed castle turned art gallery, built by one dedicated mason.

A medieval setting reimagined into a unique art alley.

A spectacular Petrine Baroque summer palace commissioned for Catherine I by Peter the Great.

Walk along the medieval fortifications that have been protecting Tallinn since the 14th century.

This set of concrete chambers resonates according to different notes of octaves.

This striking memorial is one of Estonia’s most controversial Soviet leftovers.

An underground nightclub helped spark a "Singing Revolution."

The oldest continuously operating pharmacy in Europe.

A secluded art gallery hidden within the cellars beneath Tallinn’s medieval monastery.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.