The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

Senators used to relax in the nearly forgotten marble tubs now hidden in the U.S. Capitol Building's basement.

The towering figures were created from the cemetery's fallen old-growth trees.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

The odd depiction of the Virgin Mary and baby Jesus is rooted in the Catholic Church's eradication of Catharism.

Invented in the mid-19th century, this machine could send copied images via telegraph lines.

Small on the outside, big on the inside, this church is an astonishing act of visual deception.

Nestled in the heart of Milan is a real wunderkammer of morbid curiosities.

An exclusive waiting room built for the royal family in the 1920s is hidden in Milan’s central station.

An exquisite collection of fairytale conveyances that puts most car museums to shame.

In Portugal, a secluded stretch of untouched natural beauty hides at the bottom of a steep hill.

Vast network of air raid tunnels beneath Lombardy's capital.

A surprising, but overlooked example of geology in the middle of the nation’s capital.

A celebrity from the late Cretaceous period.

The span is crooked and made from two older recycled bridges.

A diminutive plaque recalls the treetop sniper who almost killed Abe Lincoln.

Giant acorn-shaped 19th century gazebo from which suburban Washingtonians gazed upon the original "silver" spring.

One of the largest collections of Catalan literature and cultural materials outside of Spain, created by a community of 1960s expats.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

The site where Poe "in great distress, and ... in need of immediate assistance" likely died.

The largest cemetery for enslaved people in Loudoun County was almost lost to history, if not for the research of a minister.

This ruined quarry once produced the distinctive red sandstone used for construction projects in Washington, D.C.

FDR's Art Deco hospital tower was hopelessly inefficient.

A former major munitions plant that has been converted into a sprawling art space.