Science fiction's grandfather has a fittingly marvelous tomb.

A trio of giant wooden megaphones turn up nature's volume in this Estonian forest.

This magnificent arch is all that remains of a former smelt mill.

Invented in the mid-19th century, this machine could send copied images via telegraph lines.

Underground monastery and fortress.

A church that bred legends, and served as an inspiration for the Da Vinci Code.

This French castle is said to have once held the Holy Grail but is now a gorgeous mountaintop ruin.

Fascinating town where normal life interfaces with the occult.

This religious complex carved into a cliff is steeped in legends of miraculous stags and the Holy Grail.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

One of London's oldest houses contains a mixture of both old and modern features.

Pick up this rock and become an instant legend.

No other place in Scotland has such a high concentration of prehistoric carved stone surfaces.

Preserved behind glass, the ruins of a medieval building used to store human remains.

The crumbling ruins of an abandoned 12th-century monastery.

In the 1940s, Italian architect Mario Cavallè built a dozen of these round homes in northern Milan.

A Swiss magician's vault of oddities.

An amazing model of a whale's jaw bone pays homage to the region's seafaring traditions.

A tribute to the first human in space.

On the wall of this medieval walkway, a symbol of the Spanish Inquisition.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

Ride in 1960s style on the private luxury train Marshal Josip Tito used to travel around Yugoslavia.

This historic little railroad runs through some of the most beautiful scenery in Germany.

A historic steam train meanders along one of the most scenic rail routes in Germany's Black Forest.