Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

Go inside to really appreciate this 500-year-old technological masterpiece.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

A snapshot of the city's fascinating voodoo culture.

It houses the remains of a 17th-century version of the Titanic.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

NASA's leading space science lab started by a co-founder with deep ties to the occult.

Hiding amid the largest camellia collection in the country lies a charming children's maze, donated by a secret admirer.

This legendary urban waterfall creates a dazzling display of rainbows.

Watch the newest land on the planet form before your eyes.

The remains of an abandoned air force hospital located on a redeveloped Air Force base.

A tunnel of hardened lava along Maui’s famous Road to Hana.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

A tunnel with windows, so you don't miss out on the impressive views.