According to folklore, Vermont's slanted windows were installed to keep witches from flying into the house.

The crypts are so large they're basically their own underground church.

This mesmerizing statue of a child wrestling an anteater symbolizes the native culture and biodiversity of São Paulo.

Site of one of World War I's most horrific scenes.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

The Belgian royal family's private depot now stands abandoned and forgotten alongside the tracks.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

Underneath a chalk hill in France lies what Hitler hoped would be the underground launching base for a devastating new weapon.

A rare example of World War I trenches from the British front.

The former home of a trailblazing surrealist is still filled with haunting dolls and grim paintings.

In an area where the remnants of WWI are discovered on a regular basis this preserved frontline trench may be the most amazing.

The site where one of the most famous poems of World War I was composed is preserved to honor the legacy of the work.

These crumbling Nazi artillery bunkers are now fair game for massive graffiti projects.

The tomb of a hard traveling saint is constantly covered in shoes as offerings to heal disabled youth.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

Theme park featuring miniature replicas of European monuments.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

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

London's only public statue of the much-married monarch adorns the gate to St Bartholomew’s Hospital.

This 15th century pub is one of only two pubs in England situated on consecrated ground.

This historic abandoned train station looks like a stop for ghost trains.

Every hour on the hour a naked heroine and her leering foil appear from this giant cuckoo clock.

One of the largest sculpture collections in the U.K. features history's greats, from Bob Dylan to Galileo, in bronze.

This concept building is the UK's first attempt at making a permanent structure of nothing but trash.