Underground

Seoul Metro - a convenient and fast way to move around South Korea's capital
a convenient and fast way to move around South Korea's capital
Pyongyang Underground - public transportation with beautiful metro stations and old German trains
public transportation with beautiful metro stations and old German trains
Sitanagyi Hpaya Pagoda Temple - climbing into an ancient temple and feeling like Indiana Jones in Bagan
climbing into an ancient temple and feeling like Indiana Jones in Bagan
Dambulla Cave -
very old Buddhist temple complex built under an overhanging rock
Gupteshwor Mahadev Cave - hidden underground Hindu temple next to a thundering waterfall
hidden underground Hindu temple next to a thundering waterfall
Vien Xai Caves - playground of a terrible war and birthplace of a new government
playground of a terrible war and birthplace of a new government
Cu Chi Tunnels - crawling deep underneath the surface where Vietnamese hid from bombs
crawling deep underneath the surface where Vietnamese hid from bombs
K20 Tunnel - escaping from the living room of a local house into freedom
escaping from the living room of a local house into freedom
Me Cung Cave - exploring the small cave on the small island within the Ha Long Bay
exploring the small cave on the small island within the Ha Long Bay
Lagtaras Island - diving into a refreshing pool inside a dark cave on a small island
diving into a refreshing pool inside a dark cave on a small island