Tucked between a side street and a theater, this arch once led to a prestigious riding school, and now opens to a courtyard and community garden.

Unlike most arches, this geological oddity formed in a volcanic dike.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

This stately clock was gifted from China's last imperial government to the people of Mexico.

A home built with marble tombstones from the graves of 2,200 Union soldiers buried in a Virginia cemetery.

All aboard the world's longest miniature railway.