This circular Iranian jail was once a political prison run by the country's secret police.

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

A 17th-century mosque that was used for war more than worship.

A palatial sculpture park was built illegally and in secret by a self-taught artist over 36 years.

One of the largest necropolises in the world is home to a stunning array of historic Middle Eastern tombs.

Liquor and flowers mark a holy site for Indian motorcycle riders.

This bright pink Gandhi memorial was built so that sunshine hits a specific spot on his birthday.

This ancient Hindu temple is covered in thousands of colorful statues and has a long mythological history.

The golden Buddha statue at the Wat Muang Monastery is the tallest in Thailand, and the ninth-tallest in the world.

This quaint museum tells about more than just the birth of Jesus: "betlémy" are an important piece of Czech history.

A massive 1830s industrial site once known as Czechia's "Iron Heart" has been transformed into a playground of science, technology, and art.

This dramatic monument in Colombia honors a little-known indigenous fighter for independence.

A tongue-in-cheek arcade where the games are based on everyday life.

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

Tucked away near more famous landmarks lies a statue meant to symbolize the confluence and continuing development of human culture.

The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

This hidden rooftop garden in downtown London offers a quiet respite from a bustling city.

A kaleidoscopic warehouse-maze of handmade neon signs.

This historic national park is covered in the stunning ruins of red rock pueblos.

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

A program of Communist glamour in post-Stalin Poland is preserved in this colorful museum.

This pyramid in southern Sweden houses the remains of an eccentric nobleman, who spent his life doing whatever he felt like doing.

The iconic statue was moved to a new spot overlooking the James river after several years as a mascot for the local baseball team.