A stranded woman lived alone on this remote island for 18 years, inspiring the great children's novel "Island of the Blue Dolphins."

Stuck in a bygone era, the oldest subterranean shopping street in Japan hides beneath the popular Asakusa district of Tokyo.

Walk down these stairs to get an underwater view of Switzerland's Lake Zug.

This North African stone complex is considered to be the oldest astronomical observatory on Earth.

Across the islands, baked goods, sauces, and much more are for sale 24/7.

This 15th-century structure had a long, tortuous journey to its current location.

These trenches were used to train the Scottish military for life on the frontlines of World War I.

Edinburgh’s version of the Sistine Chapel is this former church, with an interior covered in paintings done by one woman over the course of nearly a decade.

An artistic interpretation of the history of a Scottish park, combining poetry with anthropomorphic animals.

An iconic red telephone box turned tiny art gallery.

An artist's whimsical transformation of everyday objects.

The building where Mary, Queen of Scots was said to have bathed in white wine.

This former train tunnel is filled with lines from a poem crafted by Robert Louis Stevenson.

The U.K.'s first underground railway line is now a lively thoroughfare for runners and cyclists.

Enter this small nook and you'll be surrounded by 360 degrees of street art.

This alley off Edinburgh's Royal Mile contains remnants of the city's seedier history.

These steps offer a breathtaking view of one of Europe's most besieged fortresses.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

Sprawled across the Great Hall ceiling are various constellations and images relating to the zodiac.

A sweet symbol marks the place where torturous executions were once carried out.

A labyrinthine network of chambers with a storied past hides below Edinburgh's South Bridge.

A secret garden in a picturesque Edinburgh village has inspired artists for centuries.

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

This allegedly haunted 16th-century tower house-turned-museum exhibits thousands of spectacular objects.