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.

A rare surviving Victorian greenhouse designed specifically to house giant water lilies.

Stockholm's deepest subway station is also a stunning ecological wonder.

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.

Sweden's first nuclear reactor, R1, can be visited 25 meters underground.

This Greek Orthodox church houses the mummified body of St. Spyridon.

The alleged vampires after which these islets are named may have actually been plague victims.

Elaborate stone houses constructed from the ruins of war.

This sixth-century church housed an icon with eyes so beautiful legend has it they inspired the name of a Greek city.

Dedicated to the god Dionysus, this theatre was used for both musical and theatrical performances.

A lonely medieval monastery on an uninhabited island.

Scores of wax baby figurines add an unusual mood to this beautiful church on the Greek coast.

A series of waterfalls create the illusion of perpetual rainfall in this hidden gorge.

An islet filled with wooden houses where the open sea meets a lagoon.

This slumbering beast honors the Bavarian soldiers who died in Greece during a 19th-century typhoid outbreak.

This 11th-century Greek monastery has renowned mosaics and relics of a brutal past.

Overlooking the harbor is a beautiful neglected mansion guarded by two Egyptian sphinxes.

According to legend, this cavern holds the passage that Persephone used to travel to and from the underworld.

Learn about the sweet, storied legacy of beekeeping in ancient Greece.

This 13th-century monastery chiseled into the side of a mountain is equipped with a bridge that can be lifted to protect against raids.

This abandoned Greek island was the last active leper colony in Europe.

One of the largest single-span stone-arch bridges in the Balkans looks like something straight out of a fairytale.

Poseidon? No one seems to know.

A small island with shimmering pink sands, home to loggerhead turtles and rare plants.