A historic house in St. Louis was plagued by a series of suicides committed by family members involved in a successful brewery.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The city of Rockford, Illinois is symbolically protected by a quartet of fittingly stony sentinels.

The arboretum whose marshy soil sucked up the dreams of housing developers.

A tribute to the twin ideals of religion and patriotism, built by a Catholic priest from rocks, glass, and innumerable found items.

A bizarre house filled with an astounding array of collections.

A bypass decorated with large wooden troll carvings.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

Yale University's home for rare works, including the mysterious Voynich Manuscript.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

Three prestigious academic collections come together to create a world-class natural history museum.

This taxidermic smorgasbord was co-created by an artist poached from the Museum of Natural History.

One of Australia's largest collections of preserved animals is on display in a historic theater.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A church of bones, decorated with 40,000 human skeletons.

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

Underneath this small church are 15,000 bones, arranged by an obsessive academic.

Thousands of well-dressed mummies below a monastery.

A swing to dangle you off the very edge.

Ecuador's largest Incan ruins show evidence of sophisticated irrigation and diplomacy among the ancient builders.