Op-art architecture designed for happiness.

Museum devoted to the artificial language of Esperanto.

A silly medieval mural preserved on the side of a Viennese house.

Handsomely crafted representations of our round planet.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

The studio built by fascists in the hopes of "reviving the film industry" with the occasional propaganda film opportunity thrown in.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

2300-year-old Roman road connecting the empire.

A fairy tale castle in modern Rome.

Earth's rocky history has rarely glittered so brightly as it does in this Spanish museum.

A rare view of a preserved Victorian science museum.

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

Commonly acknowledged as the only public monument to the Devil himself.

An ancient Egyptian temple in the middle of Madrid, Spain.

On La Gomera, "Silbadors" communicate in a 4,000-word language of whistles.

Contemporary art inspired by natural history and science drawing on ancient techniques in a modern world.

Shop selling 500 flavors of soda has something for everyone.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

NASA's leading space science lab started by a co-founder with deep ties to the occult.

Historic funicular railway, believed to be the shortest railroad in the world.

Every year, over 25,000 monarchs overwinter in Pacific Grove.

Haunting and beautiful trees, doomed to die.

Oldest building in California still in use.