Its columns were all carved from the same white oak tree.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

The first declared National Monument in the United States.

This 38-drawer structure claims the superlative title, but it isn't the world's only giant filing cabinet.

A tunnel with windows, so you don't miss out on the impressive views.

Three hundred years of preserved Spanish colonial history in San Antonio.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

Carrying on the legacy of a short-lived experimental school tucked away in the mountains of North Carolina.

A wedding chapel, vintage clothing shop, and bar all under one roof.

One man's swirling six-acre monument of stone.

An allegedly cursed tree represents a town's reckoning with a racist past.

These 20-foot sculptures will help guide you from the local train station to the local sculpture garden.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

A playground inspired by differential calculus dangles from the ceiling of the Liberty Science Center.

A world-class collection of mechanical musical instruments and automata.

The remains of a century-old mansion that met a fiery demise years after it was deserted.

This tiny New Jersey village has lived many lives but seems determined to remain a ghost town.

A unique sculpture park that specializes in the huge and bizarre.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

The South's nickname was supposedly born at a former bank in New Orleans' French Quarter.

The oldest operational cathedral in the U.S. has one shell of a way of projecting speakers' voices.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.