The curios of pharmacist and collector Henry Wellcome.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

The anatomical-pathological collection of a man who changed surgery.

The natural history museum displaying the British bird collections and dioramas of Edward Booth, free of charge.

The largest greenhouse in the world is home to over one million types of plants.

The world's largest collection of witchcraft regalia.

This antique prison is a tourist attraction with a sordid past.

St George's Leprosy Museum depicts the gruesome afflictions of those suffering from the disease.

Walk behind a 50-meter-high waterfall.

Longest road tunnel in the world features an air treatment plant and the illusion of daylight.

Home to three historic ships from the age of Vikings.

Come for the flowers, stay for the bats!

This trio of Australian rock spires may have inspired aboriginal legend or just modern tourism.

A natural arch offers panoramic views of Yangshuo's karst hills.

Climb to the top of the world's largest seated bronze Buddha.

Deep in the Thar desert, a temple crawling with thousands of holy rats.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

The world's second-largest sundial, made entirely out of stone.

A limestone wonderland of water and subterranean secrets.

A treasure trove of pathological, forensic, parasitological, and anatomical specimens.

Abstract dinosaur models in London.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.