A 19th-century Neoclassical building now housing a Hindu temple represents modern-day Glasgow at its most multicultural.

This waterfall is one of the most spectacular natural features in the Scottish Lowlands.

The lab where the scientist made his groundbreaking discoveries is preserved on the basement floor of the Faraday Museum.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

An engineering error ensured this cavernous 350-foot-long subterranean thoroughfare was never used as intended.

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

A open air theatre built on a cliff by an eccentric British woman.

Follow the original medieval paths that wind through this intriguing section of the city.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

A set of seven houses, each built in a style that represents a European country.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

Amsterdam's narrowest house facade is a monument to 17th-century tax evasion.

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

This unattributed sculpture in Amsterdam is hiding in plain sight.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

One of several Lilliputian portals that are ready to transport passengers to other dimensions, if they can find them.

This beautiful deer park was built so King Charles I and his court could go hunting while escaping a deadly plague outbreak.

A domino effect created with Britain’s iconic telephone boxes.

A musical composition 1000 years in length plays at the Trinity Buoy Wharf in London.

Where condemned pirates met their grisly end at the gallows on the River Thames.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.