Infrastructure

One of the world’s few undersea pedestrian tunnels connects Honshu and Kyushu islands.

A seven-story circular concrete tower, once the heart of Ferrara’s Eridania distillery, resembles a modern industrial Colosseum.

A monorail that was built to serve a new development but technical problems, lack of users, and a pandemic caused it to be closed and abandoned.

Raised catwalk walk through the trees alongside a river starting from an abandoned and colorful pumping station.

Once a vital asset for Southeast Alaska’s timber industry and the backdrop for the gritty 1954 film noir classic Cry Vengeance, the Connell Lake dam now stands as a tragic yet scenic barrier blocking vital fish passage.

Walk underneath a railway bridge over the river Reuss with just a metal grating under your feet.

Hidden under a shopping centre is the genesis of modern Liverpool.

Remainders of the defenses established at the start of the previous era in Thai history

The oldest surviving example of the aqueducts that crossed the Casa de Campo to distribute water.

Bunski Kanal is a hidden natural wonder where the emerald Buna River dramatically merges with the mighty Neretva through a narrow limestone channel.

The longest pedestrian tunnel in the world.

Scenic semi-abandoned bridge with easy access

Before this fine stone viaduct was built, trains ran across a rather wobbly wooden trestle, and the original abutments are still there.

The Afro-Caribbean workers who constructed the Panama Canal built this church-turned-museum in their spare time.

This 80-foot towering concrete structure, complete with wheel, remains a stark reminder of the coal mining that took place here between 1904 and 1966.

Closing the station left a big hole in the ground. So they put in a shopping centre, a block of apartments and bus station over it and the largest undercover car park Europe in it.

This quaint river crossing is the last car-suitable wooden bridge in the Swiss canton of Valais.

A small, archaeology park outside Settle in the Yorkshire Dales with ruins of the impressive Hoffman Lime Kilns and an informative trail which explains the industrial history of the site and leads you to other ruined structures.