EditorialFungi grows in the concrete wall of a tunnel underground during an Urbex Tour session in Kyiv, Ukraine, on Sunday, May 7, 2023. (Nicole Tung/The New York Times)
EditorialFungi grows in the concrete wall of a tunnel underground during an Urbex Tour session in Kyiv, Ukraine, on Sunday, May 7, 2023. (Nicole Tung/The New York Times)
EditorialFungi grows in the concrete wall of a tunnel underground during an Urbex Tour session in Kyiv, Ukraine, on Sunday, May 7, 2023. (Nicole Tung/The New York Times)
EditorialFungi grows in the concrete wall of a tunnel underground during an Urbex Tour session in Kyiv, Ukraine, on Sunday, May 7, 2023. (Nicole Tung/The New York Times)
EditorialFungi grows in the concrete wall of a tunnel underground during an Urbex Tour session in Kyiv, Ukraine, on Sunday, May 7, 2023. (Nicole Tung/The New York Times)
EditorialFungi grows in the concrete wall of a tunnel underground during an Urbex Tour session in Kyiv, Ukraine, on Sunday, May 7, 2023. (Nicole Tung/The New York Times)
EditorialFungi grows in the concrete wall of a tunnel underground during an Urbex Tour session in Kyiv, Ukraine, on Sunday, May 7, 2023. (Nicole Tung/The New York Times)