An underground city of ancient quarry tunnels hid thousands of Allied soldiers in WWI.

A monument to the thousands of Canadian soldiers who died capturing the French ridge during World War I.

The 16th-century church was kept in its ruined state as a reminder of the casualties of World War I.

This bunker in northern France was built by Nazi German forces with the intention of launching up to 50 V2 rockets at London each day.

This disused boat elevator was saved from the scrap heap so that visitors could tour its rusting skeleton.

Sample port and quinine-fortified wine at this fourth-generation winery near Porto.

Sample some of Iberia’s best tinned fish at this century-old cannery just north of Porto.

Before this rocky hill was home to a chapel, it was used as a lookout by Romans and Moors.

The ruins of a 16th-century bridge loom over Olivença's sovereignty.

This museum documents the ancient practice of salt production in Figueira da Foz.

Legend has it the lovelorn tears of a princess and a shepherd boy formed the blue and green twin lakes in the Azores archipelago.

This tower once served as a radar station during the Cold War.

An abandoned anti-smuggling station decays along the boundary between Portugal and Spain.

This Portuguese bullring is built right into the caldera of an island volcano.

An abandoned mining complex in Serra do Gerês.

Rabanadas, the Portuguese answer to French toast, are reborn here with a glassy sugar crust and a center as light as whipped cream.

This abandoned fortress still stands guard over the Guadiana River despite a history of warfare.

Explore a remarkable 35-hectare sculpture garden located an hour outside of Lisbon.

This enigmatic Roman tower lurks just outside Belmonte.

A devasting 2020 fire left this historic seminary in ruins.

The crumbling ruins of an abandoned 12th-century monastery.

One of few vertical lava tubes in the world accessible by foot.

An ancient tomb that still stands in Portugal.

A neolithic tomb converted into a tiny chapel.