The world's oldest bookshop still in operation.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A typographic tribute to the many comedic greats who make Great Britain laugh.

The second-longest pier in the U.K. stretches a whole kilometer into the Irish Sea.

This bronze statue was dedicated to a 1966 Beatles hit.

Locals spent years successfully fighting to save this beloved Brutalist behemoth from demolition.

Everyone's favorite clay duo immortalized in bronze.

The small bright red pillar survived the 1996 Manchester bombing virtually unscathed.

A hunk of prehistoric lava rests amid the Gothic architecture of a campus quad.

The medieval legend behind this holy well was one of the inspirations behind "Alice's Adventures in Wonderland."

This historic pub is a hidden gem for fans of Lewis Carroll.

Order a salt beef-loaded beigel at any hour of the day or night at this East End institution.

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

Underneath one of the region's most historic roads lies the home of Plato's successor.

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

This gem is often wrongly overshadowed by the larger, newer Metropolis church in Athens.

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

A man's head is enshrined beneath a statue near the first building constructed for the modern Olympic Games.

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

Gladiators once walked this ancient, subterranean passage.

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

This historic structure has been used as a mosque, a barracks, a prison, a school, and a bakery.

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

Legend says it was constructed with the destroyed pillar of an ancient Greek Temple.