An ancient monastery, a locked room, and a mysterious book heist.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

A trash dump made beautiful by nature's power.

This whimsical seashell-shaped place of worship was designed to blend into its surroundings.

The Habsburgs' royal collections of art and wonders.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

Baroque celebration of the end of the Great Plague of Vienna.

Op-art architecture designed for happiness.

This cubist Vienna church building looks like some sort of alien stonehenge.

In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

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

Handsomely crafted representations of our round planet.

Museum devoted to the artificial language of Esperanto.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

Dine amidst exotic plants at this former royal greenhouse.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

A massive explosion that leveled hundreds of buildings in the city of Leiden is remembered by a waterside plaque.

It's forbidden to dig within this ancient Roman fort hidden beneath a playground.

This 11th-century castle sits so low you can't see it behind the surrounding buildings.

Graffiti covers the walls of a room where university students through the centuries have waited nervously to defend their theses.

People have been placing babies on these lilies for photoshoots since the Victorian era.

The works of poetry's biggest names grace the walls of the city of Leiden, all carefully painted by hand.

Science meets wall art to highlight the beauty of famous mathematical equations.