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

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

A complimentary beverage is offered to the bodega's resident rodents every day.

Red, white, and blue painted steps along with a Union Jack celebrate the outcome of Gibraltar's 1967 referendum.

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

The oldest-known example of a historic architectural style recognized by UNESCO.

Whitewashed mosque contains the world's largest carpet.

The world’s largest LED display, built over an F1 race circuit.

The largest falcon hospital in the world, caring for over 6,000 feathered patients every year.

A faithful reproduction of Al-Jazari's enormous water clock.

This indoor ski resort has a mountain contained inside a mall.

A preposterously luxurious hotel with gold-plated iPads, Rolls Royce chauffeurs, and a staff that trains by watching "Downton Abbey."

On any given day this sprawling market houses literally tons of government-regulated gold, gems, and precious metals.

Historic cuisine meets fine dining in a hotel-restaurant overlooking Hyde Park.

Hear the quietest sound from across the dome.

The commemorative stone column conceals a secret laboratory.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

Its collection includes a broad array of social, geographic, graphic design, and political history.

At the top of the hour, figures of the London department store's two co-founders emerge and bow to each other.

This one has sailed five times as far as Sir Francis Drake's famous ship.

Originally meant to hold a statue of King William IV, this support sat empty for years. Today, it hosts a rotating cast of public artwork.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

A student driver's nightmare.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.