Best Photos of the Day

Rebuilt tools, inspired by found prehistoric patterns, are pictured at the salt mine in Hallstatt, Austria, on August 16, 2018. Like for all mines, a fresh round of strengthening work has become necessary for Hallstatt, the world's oldest salt mine which is located in the Austrian Alps. But Hallstatt isn't like other mines. Alex HALADA / AFP

The entrance of the salt mine heritage (Erbstollen) in Hallstatt, Austria, is pictured on August 16, 2018. Like for all mines, a fresh round of strengthening work has become necessary for Hallstatt, the world's oldest salt mine which is located in the Austrian Alps. But Hallstatt isn't like other mines. Alex HALADA / AFP

A bronze ornament found in the prehistoric salt mine, is pictured on August 16, 2018, in Hallstatt, Austria. Like for all mines, a fresh round of strengthening work has become necessary for Hallstatt, the world's oldest salt mine which is located in the Austrian Alps. But Hallstatt isn't like other mines. Alex HALADA / AFP

The remains of a 3,000-year-old prehistoric salt mine are pictured in Hallstatt, Austria, on August 16, 2018. Like for all mines, a fresh round of strengthening work has become necessary for Hallstatt, the world's oldest salt mine which is located in the Austrian Alps. But Hallstatt isn't like other mines. Alex HALADA / AFP

Hans Reschreiter, chief archaeologist at the Natural History Museum in Vienna, is pictured with rebuilt tools, inspired by found prehistoric patterns, at the salt mine in Hallstatt, Austria, on August 16, 2018. Like for all mines, a fresh round of strengthening work has become necessary for Hallstatt, the world's oldest salt mine which is located in the Austrian Alps. But Hallstatt isn't like other mines. Alex HALADA / AFP

Kurt Thomanek, technical director of Salinen Austria AG, is pictured at the entrance of the salt mine, in Hallstatt, Austria, on August 16, 2018. Like for all mines, a fresh round of strengthening work has become necessary for Hallstatt, the world's oldest salt mine which is located in the Austrian Alps. But Hallstatt isn't like other mines. Alex HALADA / AFP

Hans Reschreiter, chief archeologist at the Museum of Natural History in Vienna, is pictured on August 16, 2018 in Hallstatt, Austria, beside well-preserved remains of a prehistoric miner, found in 1734 at the Hallstatt salt mine. Like for all mines, a fresh round of strengthening work has become necessary for Hallstatt, the world's oldest salt mine which is located in the Austrian Alps. But Hallstatt isn't like other mines. Alex HALADA / AFP

Hans Reschreiter, chief archeologist at the Museum of Natural History in Vienna, is pictured on August 16, 2018, at the salt mine in Hallstatt, Austria. Like for all mines, a fresh round of strengthening work has become necessary for Hallstatt, the world's oldest salt mine which is located in the Austrian Alps. But Hallstatt isn't like other mines. Alex HALADA / AFP