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

A subterranean shelter remains intact under a busy Paris railway station.

A shrine-like museum entirely dedicated to soccer superstar Cristiano Ronaldo.

One of the world’s longest pedestrian suspension bridges.

This star-shaped military outpost is now simply trying to protect itself from neglect.

You can cross from one country to another in a single hop on this little bridge.

This now abandoned restaurant provides some of the most amazing views of Lisboa.

The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.

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

A garden in Lisbon filled with giant porcelain creatures.

This charming candle shop has been in business since 1789.