Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

This Roman arena once played host to bloody gladiatorial battles.

Stunning Roman aqueduct used for 1900 years and still standing.

A beloved upside-down beacon off the coast of Northern Ireland.

Petting this mysterious iron monkey supposedly brings good luck.

Abandoned since 1998, this train station has become an oasis for urban explorers.

According to this bar, God gave an “11th commandment” to Antwerp: Thou shalt drink beer.

The highest point in Belgium is a staircase to nowhere.

Christ's blood preserved in a Belgian town.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

Nicolas Schöffer's massive interactive sculpture was assembled in 1961 and brought back online in 2016.

A man throwing a giant severed hand towers over Antwerp’s main square.

This statue dedicated to the story of a Flemish boy and his dog was relatively obscure in Belgium, but a cult sensation in Japan.

This giant urban staircase was built to keep the city's brave fighting men from getting waylaid in the red light district.

This recently restored crypt was once plagued by liquefying coffins and exploding caskets.

Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

This abandoned Belgian fortress is purposefully being left to nature.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

Invisible bridge parts the waters, invoking biblical images and preserving the ominous feel of an ancient moat.

This Russian diner is staffed entirely by twins.

For lovers of Soviet cinema, this museum is home to a vast collection of artifacts and costumes.

The sign marks one of the endpoints to mainland Britain's longest overland travel route.

An early-20th-century "dacha" village of quaint cottages curiously located in a modern part of Moscow.