Shop of curiosities with a dinosaur museum tucked in its basement.

A science teacher's dream.

This shop for all your super spy needs hides an educational secret.

A 10 million-ton rock once worshiped by the Tahamies Indians, accessed by an astounding staircase.

A dangling church built over a Colombian gorge.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Monasteries on rock pillars, once accessible only by frayed ropes.

Narrowest house in Boston.

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

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

The only Bahá'í house of worship in North America and one of only a handful worldwide.

The macabre paintings created by famous suicide proponent Jack Kevorkian, or "Dr. Death."