This unreal Portuguese palace looks as though it's made from a pile of different castles.

This underground church is topped with a 500-foot cross that is seen by many as a beacon of fascist hubris.

An exquisite collection of fairytale conveyances that puts most car museums to shame.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

Built to ward off Napoleon's army, this city-sized abandoned Russian fort is now perfect for urban exploration.

A small monument in Lithuania marks the geographic center of Europe—or at least one of the claimants.

While this monument tile is shrouded in mystery it also marks the end of the longest ever human chain.

The most famous location in China was home to whole dynasties worth of imperial rulers.

Breathtaking and huge 430 year old maps of Italy.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

A little sculpture with a large wardrobe.

One of the largest Roman settlements in Portugal.

The "Little Ones," show Portugal in full miniature splendor.

Pagan monument converted to Christianity with the population.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

Single runway interrupted by a busy road that cuts across its middle.

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

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

This micro-nation may be some sort of prank, but its constitution sure seems official.

The hallucinogenic center of the ancient world.

This legendary city has been a tourist attraction for centuries.

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

Where commuters walk through remnants of an ancient Greek necropolis.