These towering spires and glowing walls are carefully crafted from hundreds of thousands of icicles.

An oasis of beauty, tranquility and botanical research in the middle of Rome.

A 15th-century whalebone is tucked away in an unassuming corner of this medieval church.

For more than 25 years, this Philadelphia store has been offering a wide selection of Victorian oddities and antiques.

A sewing machine tycoon built this miniature castle for the people and to beautify a lakeshore.

A stately castle in the northern Italian countryside has been restored after years of neglect.

A medieval village, with red wooden cottages around a stone church, stands as a well-preserved example of a settlement type that was once common in northern Sweden.

This bee-themed family business does more with honey than anyone would think was possible.

Several 12th-century ruins can be found inside this historical market.

Once considered one of the country's finest motte and bailey castles.

This ruined castle perched atop a rocky peak is a great place for a hike.

Every part of this unusual home is built into the sandstone rock.

An army of sleeping knights sculpted by a self-taught local artist beautifully depict an old Czech legend.

A Baroque mansion with ties to legendary magicians and alchemists.

An enormous and lavish Gothic church in Czechia.

The largest manmade caves in Europe now function as a motorbike club's headquarters.

The 14th-century ruins are said to contain healing powers.

The soulless eyes of 82 bronze children stare on forever in remembrance of a horrifying World War II massacre.

Underneath the city that invented pilsners are a series of historic tunnels that have been storing beer for centuries.

The mystery of the Putim Ossuary involves a tricorn hat.

This network of conjoined cellars was riddled with traps and supposedly allowed the townspeople to pretend their homes were deserted.

These 17th-century mummies are no longer naturally preserved, but remain on display today.

Folklore says this medieval fortress was plopped atop a portal to hell to trap the demons below.

The deepest sinkhole in Central Europe comes with a grisly tale and an unusual nickname: “The Stepmother Abyss.”