A natural swimming pool in the middle of the Carite Forest.

An ancient octagonal weather station named for the eight Greek gods of wind.

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

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

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

This ancient subterranean megalopolis is known for the hot oil traps that were installed above each of its entrances.

The largest Neolithic ruins in the world hide a notably clean prehistoric metropolis.

This pink watchtower served as the seat of the Greek government after independence from the Turks.

Poseidon? No one seems to know.

An important example of architectural history slowly decays in the city center.

A Japanese video game arcade hides in the back of a Swedish pool hall.

Eat a Nobel banquet from any year in the basement of Stockholm's City Hall.

This Stockholm light tower can be controlled by anyone with a smartphone.

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

This cobblestoned medieval-style town was entirely constructed in the 1990s and 2000s.

This collection of 80 polarizing foods aims to challenge your subjective notions of repulsion.

Swedish mice can dine at the Nuts of Life restaurant or take a date to the amousement park.

This castle ruin in the middle of nowhere is a gem for wildlife enthusiasts.

Hotel designed by indie graphics artists.

A little-known cafe in an old copper bridge tower with 360-degree views of the harbor.

The gilded, masterful astronomical clock will calculate time, dates, and planetary positions for thousands of years to come.

Hans Christian Andersen for the postmodern world.

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

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