A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

The sign at the garden gate reads: “These Plants Can Kill.”

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

The most biologically diverse protected area in Africa is also the most dangerous.

Mount Nyiragongo has erupted at least 34 times since 1882 and is home to the world's largest lava lake.

D.C. once had its own tiny rival to the New York Stock Exchange.

Look closely and you’ll notice that the color changes a third of the way up the tower.

An overlooked memorial honoring the local Washington residents who died in World War I.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

The walls of the iconic dome are hollow and have a secret stairway.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

Huge masonic hall in Philadelphia with lavishly themed rooms.

An ancient chamber filled with wonderful rock art and a Neolithic carving of a human face.

This Bronze Age tomb is the centerpiece of a clearing within a beautiful Irish forest.

This World War II relic let Allied pilots know they were entering neutral airspace.

This neon landmark has been posing this deadpan question to follicly-challenged Dubliners for over 50 years.

An oddly conical beacon perched atop beautiful Irish cliffs.

This natural sea arch highlights Ireland's rugged coastal beauty.

A mysterious Neolithic tomb is perched along the edge of a modern golf course.

The severed head of a 17th-century Irish martyr lies within an intricate golden shrine.

An Irish town has built a statue to a silent film actor simply thanks to the holidays he once spent there.

This modest plaza in Moneygall, Ireland has cashed in on its distant connection to the U.S. president.