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

Luminaries of all stripes have sipped strong Greek coffee at this cafe since 1839.

Legend says this sacred tree was a gift from goddess Athena.

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

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

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

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

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

This Welsh village gave itself a ridiculous name in a publicity stunt a century ahead of its time.

A bronze tribute to the wildly popular video game from the '90s.

There's something in the air as history repeats itself at this museum dedicated to the Swedish pop band.

A collection of trees from various corners of the world call Stockholm University home.

Sweden's "good old days" painstakingly re-created in a model village.

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

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

In a resort town where the real Alice spent her summer holidays, iconic characters create a curious trail.

One of the oldest suspension bridges in the world blends in perfectly with a medieval castle.

One of the few surviving street funiculars in the world.

A former fisherman's hut deemed too small for habitation is now a delightful tourist draw.

The world's largest prehistoric copper mine had 30,000 animal bones scattered throughout the maze of passageways.

On the clock tower at St. Anne's Church in Cork, you never know which face is telling the truth.

An ancient neolithic tomb that only sees the sun twice a year.

This ancient Irish religious site is covered in ancient carvings, many of which have barely aged.

The oldest inn in Kilkenny was established by the first convicted witch in Ireland.