This deconsecrated church has seen many uses, from a tobacco storehouse to a cinema.

This hydrochronometer was invented by a Dominican monk and is a prime feature in this garden.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

A sculpture serving as an homage to Pope John Paul II.

A monumental fountain in Rome features a large statue of Moses that has been criticized for centuries.

The bluer than blue waters in these natural Israeli caves are reached via the world's steepest cable car.

Built by a king and rebuilt by an emperor, this aqueduct transported water for 1,200 years to this ancient Mediterranean hub.

Tel Aviv's popular neighborhood went though endless waves of transformation.

Ozymandias’ time-keeping temple.

Known as the Sistine Chapel of Egypt, this tomb houses some of the most well-preserved paintings in Egypt.

At 207 feet, one of the world's longest continuous escalators.

An oft-overlooked, magically musical monolith that stands majestically between Arlington Cemetery and the Iwo Jima Memorial.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

The romance of early commercial flight still fills this Art Deco destination.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

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

The 72-foot giant escaped confinement in a large patch of mulch only to be reburied in the sandy shores of the Potomac River.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

This sprawling farm was once a Cold War-era hideaway for the nation's top diplomats.

America's post-nuclear-attack chambers of Congress.

This beautiful vintage movie palace has seen little change in form or function since the 1920s.

The only recreation of William Shakespeare's indoor playhouse.

The story behind the mysterious symbol painted in front of the historic university's famous Rotunda.