Putting the "mod" in "modular" since 2000.

Shiny Brutalist box commemorates a pioneer of electricity and houses a railway transformer.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

This 1920s Dutch barge is now a floating bookstore.

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

A hands-off space for graffiti artists to hone and display their skills.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

Banksy gives themself artistic license with this piece of London street art.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

The first, and perhaps only, monument dedicated to Wikipedia.

On this Polish road, an optical illusion makes cars seem to roll uphill.

This towering statue of Jesus provided internet to the surrounding area.

A tree planted by Marie Curie is treasured by the Radium institute that she set up.

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.

A small granite monument marks where the borders of three countries meet.

This biographical museum honors the groundbreaking scientist at her birthplace in Warsaw.

This antique thermometer honors the creator of the first universal temperature scale.

This centuries-old wooden wonder was built in less than a year and is one of Europe's largest timber-framed churches.

The silly symbol for an underground protest group is now scattered around the city.

An abandoned Nazi explosives plant founded by the inventor of dynamite is now an underground museum.

Museum dedicated to "the man who moved the Earth."

Communism's topsy-turvy effect on Poland has been brought to life in this wacky tourist trap.

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.