The ruins of this Alaska gold mine form a gorgeous ghost town.

Colorful boxes placed over the dead are left to rot and crumble.

This whimsical stacked cabin looks like something out of a children's book.

The ghostly remains of what was once the world's richest copper mine.

Inside this small brick bungalow is a collection of toys intended for the afterlife.

Once one of the largest producers of pig iron in the world.

The former home of the hard partying literary power couple is now one of the only museums devoted to their story.

148 feet long and in the middle of a verdant forest.

The secret skeleton of a murdered nun was discovered in this church basement, but the scandal doesn't end there.

For the holidays, the tallest broadcasting tower in the Netherlands turns into one of the world's tallest Christmas trees.

The tallest waterfall in the Netherlands is a lovely, stepped feature that is only 50 feet tall.

The former home of a mad diplomat is said to still be marked in bloody, arcane scrawls.

Two gravestones clasp hands over the religious divide.

The attic of a four-century-old canal house hides a clandestine church.

Inspired by "The Starry Night" this Dutch bike path turns into a glowing work of art each night.

Museum preserving torture methods from the past.

A turn-of-the-century architectural marvel built on healing mineral springs and salt licks.

If astronomy had a ghost, it would look like this observatory.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

Oliver Cromwell once seized the land under this house, which included the ruins of a medieval abbey that the owner used to build his stately home.

A collection of housewares from recent Irish history adjoined by a tower from ancient Irish history.

The ruins of an 800-year-old monastery boasts the tallest round tower in Ireland.

After being destroyed by IRA sympathizers, the ruins of this stately Irish manor have sat vacant for decades.

While only two of the ancient buildings at this site are actually churches this was one of the earliest Irish pilgrimage sites ever.