Unparalleled stargazing, one of Colombia's best observatories, and a swimming pool can all be found in the middle of this ancient tropical forest.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.

A little slice of Japan and its aesthetics in London's Holland Park.

Catacombs turned marketplace.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

The site of London's first coffee house has been serving refreshments of one kind or another for 360 years.

Explore nearly 400 years of English middle-class home life.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

Artists and musicians now rule over this former rail station.

This pub boasts a curious history and may have inspired a Dickens character.

Preserved behind glass, the ruins of a medieval building used to store human remains.

Little-known artist couple chose a former silk factory as the location for a museum dedicated to their work and other avant-garde art.

Tucked away inside this concrete building is a church and its grand display of brutalist architecture.

Read a book with a glass of wine at this classically restored bar.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

This magnificent market stands as a poignant symbol of the suffering caused by the Spanish Civil War.

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

Museum about life, death, and cannibalism in the Stone Age.

One of Bristol's best-hidden gems has ties to Lord Byron, whence it became the nation's first reformatory school for girls.

This Grade II Listed Building with an Art Nouveau façade once contained a unique print shop.

This mysterious underground cave in Shropshire dates back to the 18th or 19th century.