A small etching on the white marble parapet was written in runic script by a Viking mercenary.

The final resting place of 19th-century sailors previously banned from being buried within Portuguese Macau.

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

A surprising and unconventional mosque hidden in the subsoil of Istanbul.

This old KLM airplane cut into three parts was transformed into an eclectic airport gift shop.

This unassuming alcove in London’s famous Tower Bridge once served to capture, store, and display dead bodies from the River Thames.

This large sand dune in the Netherlands is home to wind-whipped trees with "floating" roots.

A miniature city, once ruled by the Queen of the Netherlands.

Historic medieval fortified city in southwest France.

An architectural marvel that combines Gothic architecture with Indian elements.

An iconic fountain dedicated to the Roman goddess Flora stands in the heart of Mumbai.

These sculptures represent the general public's hopes and aspirations of financial prosperity.

A gigantic teapot sitting on top of a parking garage in the center of Utrecht.

Metal horses galloping through a London fountain provide a link to the city's past.

The rose garden in Regent's Park where Pongo and Perdita met for the first time in Disney's "101 Dalmatians."

Catacombs turned marketplace.

A remarkable feat of Victorian engineering across the Firth of Forth.

A 19th-century defensive wall that once protected the settlement from invaders.

This giant wire frame man sculpture is crouched in contemplation.

Built by crowdsourcing, this wooden foot bridge saved a part of Rotterdam that was languishing in wait of city funding.

A modern reimagining of a medieval city gate.

An out-of-place slice of France, smack in the middle of Shanghai.

This ratty natural history collection is a charming relic among a city rushing into modernity.

This Czech church doubles as something of a permanent fashion exhibition for a statue of the Infant Jesus.