A glacier pocked with ice caves and surrounded by rainforests.

Cave carved out of a huge snow drift collapsed killing one and injuring five in July 2015.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

Morocco's Argania trees are infested with nut-hungry goats.

During an annual Catholic feast in this tiny Spanish village, men dressed as devils leap over rows of babies to cleanse them of sin.

Mirrors and glass shards cover every inch of this arrestingly beautiful mosque.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

World's largest cave was only discovered in 1991, and now offers tours to the public.

The royal seat of Henri Christophe, a formerly enslaved man who became Haiti's only king.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

The tallest stationary dunes on Earth also happen to sing.

This solitary monastery may hold the remains of Vlad the Impaler (but probably not).

Italian cave with exceptional acoustics and an unsavory history.

The encased skull that is widely believed to belong to St. John the Baptist.

Alien rock formations grown from the sands of an Australian national park.

A mysterious ancient cemetery with Roman sarcophagi and Lycian inscriptions.

The palace of the King of Kings, burned by Alexander the Great.

A flooded Mexican cave that hides a river beneath the water.

The resting place for anonymous victims of the Danube's dark waters.

An intricately decorated tiny place of worship.

Wondrous stalactites house thousands of bats in these African caves.