This 6th-century church has the largest and best-preserved collection of Byzantine mosaics outside Constantinople.

Italian poet Dante Alighieri is entombed in this small mausoleum in Ravenna, and his hometown of Florence has never been too happy about it.

Filled with goldfish swimming in a shallow pool of sea water, this ancient crypt is more wishing well than burial site.

Psychoanalyst Carl Jung reported a paranormal experience after visiting this mosaic-lined Roman baptistry.

Ivy-covered Medieval tunnels cut through this charming town in France's Loire Valley.

This century-old cinema is complete with musical interludes and boasts a rare projection system.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

Central Europe's largest collection of mini-bottles is on display at this museum devoted to a bitter Hungarian liquor.

Seven mini rowhouses fill the gap between 54 and 70 Westerstraat.

Time stands still at this serene burial ground in the center of Budapest.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

This modern monument to pagan belief looks like it was transported straight from ancient times.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

Ask nicely, and stewards of a centuries-old charitable tradition will give you free bread and beer.

Whimsical wash tubs row down the stream as part of this Carnival celebration.

A perfectly preserved hill village where the buildings are painted like white lace.

Both church and state get put to the torch in this annual festival in the "Bonfire Capital of the World."

These temples are among the oldest free-standing stone buildings in the world.

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

This unique building in the main square stands out among the city's typically Baroque architecture.

The floor of this spectacular Baroque sanctuary is covered in memento mori.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

Stone Age solar temple is aligned with the sun on each equinox and solstice.