This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

An unfortunate geological resemblance to Satan has labeled this Pasadena gorge as a passage to the underworld.

Hiding amid the largest camellia collection in the country lies a charming children's maze, donated by a secret admirer.

The legendary building that needed ghostly approval before being built.

A three-story, three-dimensional hobo clown in a tutu welcomes CVS shoppers.

World-famous, Pink's still manages to keep its prized cult fetish status.

World's largest collection of serial killer artwork and other macabre exhibits.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

A giant donut stands as a popular symbol of Los Angeles iconography.

High on a hill overlooking Los Angeles lives a world famous, high-power conical Tesla Coil.

Left untouched since a double murder-suicide in the 1960s, Los Feliz murder mansion remains a neighborhood mystery.

César Baldaccini's iconic sculpture of a 40-foot thumb stands tall in La Défense.

Paris' linguistic guide to the international language of, yes, love.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

This Australian beach is composed of tiny shells.

Living fossils in this remote Australian bay provide a glimpse of what Earth may have looked like 3.5 billion years ago.

A micronation of epic proportions.

A clear example of the process of erosion in action.

The UFO capital of Australia is the outback’s answer to Roswell.

Lonely industrial sculptures in South Australia created by a mechanic turned artist.

An opal mining town in the middle of Australia where people live, worship, and shop underground.

One of the first big sculptures anywhere in Australia.