Enigmatic tombs and cave dwellings on the outskirts of a rural village.

This almost-forgotten underground dungeon housed several convicts over the years, including Caravaggio.

A centuries-old forgotten underworld lies beneath Malta.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

Below a historic English market town lies a secret underground city complete with kitchens, laundries, storerooms, and an underground lake.

Eighteenth-century home, where Herschel discovered the planet Uranus.

With lush plants and flowers, huge trees, ponds, and hidden monuments, this place feels a bit like discovering Narnia.

Ancient Egyptian wigs, South American feather headdresses, a bounty of anthropological artifacts in Oxford.

Home to the most complete dodo remains known - one head, and one foot.

J.R.R Tolkien, C.S. Lewis, and other "Inklings" met at the Oxford pub to discuss the now legendary fantasy stories they were writing.

Used as an example in one of the first dictionary entries for "museum" in 1706.

An extraordinary collection of scientific instruments - and Einstein's chalkboard - inside the world's oldest purpose built museum building.

This battery powered bell has been ringing since 1840 and is one of the worlds longest running science experiments.

A cluster of granite granaries perched on stilts.

Relax on your veranda and watch the light show.

This rare wildlife haven in Singapore feels like you're in the tropical rainforest.

A Buddhist theme park brings you a Buddhist version of Hell.

Singapore's landscaping project is home to 18 incredible Supertrees.

Colorful umbrella-covered trees in Singapore's Little India look straight out of Dr. Seuss.