In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

Eighty million natural history specimens call this gargantuan museum home.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

Banksy gives themself artistic license with this piece of London street art.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

This collection of illusory paraphernalia has been culled from the history of London's premier magician's club.

Inside this mansion turned museum, the works of prominent Croatian artists are on full display.

A full figure 4th century incorruptible saint lies in a glass coffin in Croatia.

Gargoyle head that brings good luck.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

This tall and trim architectural oddity is one of the skinniest buildings in San Francisco.

A playing field for a popular French past time can be found tucked away in a quiet corner of Golden Gate Park.

The best place in the park to test out your throwing arm.

One of the oldest producers of hand-folded fortune cookies still uses its original secret recipe.

The largest whiskey stash on the West Coast survived the 1906 fires--but not without heroic effort.

A mysterious painting of the self-declared Emperor of the United States watches over a local hof-brau.

Martin Bricelj Baraga's monolithic sculpture measures the blueness of the sky, and changes color to match it.

An institution dedicated to curiosity, logic, riddles, and Mongolia's long history of puzzles.

About 80% of all U.S. avocados are descendants of Rudolph Hass's glorious tree.

A Himalayan monastery claims to have a piece of a centuries-old abominable snowman.

This cuddly rodent has a place of honor at a Russian institute for genetic research.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.