Sneak Peak into London's underworld via the #MailRail

[YellowChevy]

Ever heard of London's underworld? Well, why not experience the journey travelling under the streets of London? There is one such avenues of rails hidden beneath London streets.

These 6.5 miles tunnels which have been operating since December of 1927. The tunnels were used transporting royal and government documents established since 1660s.

Hop in and be fascinated how the royal mails travel in secret underneath London's busy streets.

[QueenYoora]

Why did I not know about this one when I was in London?!?! Hahaha! This is very intriguing!