Travel Briefs

At Postojna Cave in Slovenia, visitors can take a 5-hour “adventure tour” led by expert spelunkers through parts of the cave system not open to most visitors.

Meeting at Hotel Jama (Jamska cestra 28, 6230 Postojna, Slovenia; phone +386 5 700 02 00, www.postojnska-jama.eu/en/hotel-jama), with double rooms running €79-€187, tour members will receive instructions (in English) and caving equipment before heading to the cave system, where they will see geological features and water systems while rappelling, rope climbing, orienteering and crossing an underground...

Due to the COVID-19 pandemic, the US Transportation Security Administration (TSA) has made changes in airport security line procedures.

Visual cues placed on the floor will help passengers follow social-distancing rules. Facial covering is recommended but not required. (However, some airlines require it on board.) At the travel document podiums, passengers will scan their boarding passes on the readers themselves, then hold them up for the TSA officers to visually inspect them.

Carry-on food items need to be in clear plastic bags and placed into bins for x-ray screening....

The entire South Pacific island of Niue was named an International Dark Sky Sanctuary, an area protected because of its exceptional views of the night sky, by the International Dark-Sky Association (Tucson, AZ; 520/293-3198, www.darksky.org) on March 7.

The first whole country or territory to be given that designation, it is described by the IDA as a “dark sky nation.”

Niue, with a diameter of just over 100 miles, has a population of about 1,600 people. It is a self-governing island in free association with New Zealand. (It elects its own representative government...