Located right outside of Vienna, visitors can take in expansive views of an ethereal forest.

This is the oldest Roman-made bridge in the city still existing in its original state.

The best preserved Paleochristian basilica in Rome hides a number of oddities and secrets.

A 15th-century monumental Latin inscription on this house celebrates Lorenzo Manilio's love for Rome.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

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

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The tombstone of an unfortunate explorer who disappeared in the Paris Catacombs.

A glamorous hotel that once accommodated French resistance fighters and concentration camp survivors.

Natural history museum celebrating biodiversity with a parade of taxidermy animals.

Where the high court feasted, frolicked, and high courtesans put their royal lovers' diamonds to the test.

A grotto-like lodge decorated with gilded mosaics, rocks and a noisy waterfall was the setting for the most sumptuous pleasure house of 1900s Europe.

A trove of century-old litho stones from the Puck Building's printing days were discovered behind a cellar wall, and are now hanging in the store.