These fantastically named natural pools look like something out of a Scottish myth.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

This former football stadium seems almost abandoned but is still in use by the next generation of Scottish sports stars.

An impromptu shrine appeared shortly after beloved "Torchwood" character Ianto Jones was killed off the show.

The world’s only museum dedicated to baked beans.

This former military airfield's claim to fame came from a lucky accident during the Second World War.

Quirky Welsh observatory unites art and science.

Eat a Nobel banquet from any year in the basement of Stockholm's City Hall.

Street artists transformed this abandoned industrial neighborhood into one of Europe's largest graffiti exhibitions.

This legendary dessert was served to Nobel laureates for decades.

A striking depiction of Teotihuacan's mysterious "Spider Woman."

An eclectic blend of esoteric imagery covers its interior.

The population of Southeast Asian primates was introduced to Mexico in the 1970s.

History is on display in this hall, which has served as the seat of city government for centuries.

In a busy Oaxaca market, a nearly century-old drinks stand still serves family recipes from giant clay pots.

These colonial murals are a fascinating hybrid of Spanish and Indigenous aesthetics.

The Rio Lerma (Chignahuapan) in El Salto, Mexico, is one of the most polluted rivers in the world. It’s covered in white foam, and falling in can kill.

From Nunavut to Tierra del Fuego, you won't find any lighthouse higher than this one.

Legend says this tiny ancient island is the lost ancestral homeland of the Aztecs.

Pause in an abandoned hydroelectric station, now overrun with wildlife, to consider a thought-provoking poem.

An airy Art Deco space devoted to the weird and wonderful folk art traditions of Mexico.

A museum in the former home of Marxist revolutionary Leon Trotsky.

Mexico's astounding mummy museum with "the world's smallest mummy."

The ruins of an Estonian prison are drowning in the quarry lake where the convicts were once forced to work.