The station was declared a national historic site in 1992.

It was declared a historic site on June 1, 1967.

The site was declared a natural landmark on 31 January 1990.

These three sites were declared a national monument in 1909.

The site has been declared a national historic monument in 1931.

Constructed in the late 1900s, it has been declared a historic site.

Declared a historic site in the 1980s because of its architecture, it is no longer standing.

The town was declared a national cultural-historical site in 1985.

The sites have been declared eligible to be federal wilderness areas.

For one thing, the site was declared eligible in 1997 to be designated a state and national historical place.