Italian cave with exceptional acoustics and an unsavory history.

The pyramid and dome deep inside the Dzūkija forest are believed to channel divine energy.

An abstract monument to a symphonic composer.

An alien church provides much needed silence in the midst of a Finland shopping center.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

Real bones which are said to have belonged to a Polish dragon.

The drama of nature in full effect in this Nevada State Park.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

The bullet-riddled wall from the St. Valentine's Day Massacre, bloodstains enhanced for your viewing pleasure.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

Things seem to roll, flow and run uphill on this short patch of road near Ariccia, Italy.

High in the clouds of San Marino sits an ancient tower with some curious prisoner graffiti.

Caligula's colossal pleasure ships, discovered by Mussolini only to be lost in flames.

A sculpture serving as an homage to Pope John Paul II.

The "Great Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

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.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

A hospital where antique dolls are given new life.

Jesus' footprints and the first catacombs in the world.

The final resting place of the poets Shelley and Keats.