A series of waterfalls so massive they straddle the border of Argentina and Brazil.

Constructed on the ruins of a convent, this tower saved countless lives.

The fighters and conspirators that won independence for Paraguay held secret meetings at this historic house.

An art museum with an eclectic design and a scandalous past.

This "floating railway" is one of the world's oldest monorail systems.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

This natural crater along the coast of Jersey may take its name from the devil statues who have watched over it.

A statue erected in honor of the toadish nickname given to Jersey residents by the French.

An 800-year-old island castle in Guernsey's main harbor.

Underground hospital complex constructed by slave laborers during the German occupation of the Channel Islands.

An intricately decorated tiny place of worship.

The sixth of London's "Magnificent Seven" cemeteries, and a source of unlikely inspiration to Beatrix Potter.

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

A 1950s beatnik coffee house, turned 60s counterculture hotspot, turned modern music venue.

The oldest inn in England served brew to the crusaders.

This fountain pays homage to Qatar's history of pearling, the primary industry before oil.

This vibrant side road in Doha was painted light blue to reduce heat.

A 19th-century fortress and collection of artifacts offer a tour of Saudi history.

This unique museum doesn't shy away from highlighting Qatar's role in the history of slavery.

Home of the infamous Rug Man of Doha.

These beautiful historic watchtowers were used for both scanning the desert for enemy invaders and observing the celestial world.

A mesmerizing wonderland of salt-encrusted tree branches and pencil roots.

Fourteen sculptures showing the development of a fetus stand outside a hospital for women and children.

The enormous diamond-shaped building packs a trove of academic and literary treasures into one futuristic space.