Beside a busy highway, a colony of Great Blue Herons raises hundreds of offspring each year.

This campus museum commemorates a national tragedy.

This massive airship factory is so large that it has its own indoor weather.

Marvel at this turn-of-the-century masterpiece that has been turned into a rather stately supermarket.

The spectacular collection of one of the world's best woodcarvers.

A throwback train ride transports passengers through one of the lesser-known national parks in the country.

The only presidential monument to display a late POTUS's actual casket.

Cleveland's giant "free" stamp is a nod to the Civil War, but was misinterpreted for years.

Ghost stories surrounded this “castle,” the only structure from a huge mansion that was never built.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

The angel of death appears to weep black tears at this grave marker.

The fishing boats that moor in this small lagoon enter and leave through a tunnel to the sea.

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

These temples are among the oldest free-standing stone buildings in the world.

This church is named for one of the most dramatic tales in the early Christian church.

Overshadowed by other, more famous Maltese catacombs, this ancient burial chamber has one of the best examples of a ritual agape table.

Stone Age solar temple is aligned with the sun on each equinox and solstice.

This prison on the Maltese island of Gozo is almost 500 years old, and they have the graffiti to prove it.

The floor of this spectacular Baroque sanctuary is covered in memento mori.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

Five candy-colored villages on the Italian Riviera.

An enormous and lavish Gothic church in Czechia.

A church of bones, decorated with 40,000 human skeletons.

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.